1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * drivers/input/tablet/wacom_sys.c 4 * 5 * USB Wacom tablet support - system specific code 6 */ 7 8 /* 9 */ 10 11 #include "wacom_wac.h" 12 #include "wacom.h" 13 #include <linux/input/mt.h> 14 15 #define WAC_MSG_RETRIES 5 16 #define WAC_CMD_RETRIES 10 17 18 #define DEV_ATTR_RW_PERM (S_IRUGO | S_IWUSR | S_IWGRP) 19 #define DEV_ATTR_WO_PERM (S_IWUSR | S_IWGRP) 20 #define DEV_ATTR_RO_PERM (S_IRUSR | S_IRGRP) 21 22 static int wacom_get_report(struct hid_device *hdev, u8 type, u8 *buf, 23 size_t size, unsigned int retries) 24 { 25 int retval; 26 27 do { 28 retval = hid_hw_raw_request(hdev, buf[0], buf, size, type, 29 HID_REQ_GET_REPORT); 30 } while ((retval == -ETIMEDOUT || retval == -EAGAIN) && --retries); 31 32 if (retval < 0) 33 hid_err(hdev, "wacom_get_report: ran out of retries " 34 "(last error = %d)\n", retval); 35 36 return retval; 37 } 38 39 static int wacom_set_report(struct hid_device *hdev, u8 type, u8 *buf, 40 size_t size, unsigned int retries) 41 { 42 int retval; 43 44 do { 45 retval = hid_hw_raw_request(hdev, buf[0], buf, size, type, 46 HID_REQ_SET_REPORT); 47 } while ((retval == -ETIMEDOUT || retval == -EAGAIN) && --retries); 48 49 if (retval < 0) 50 hid_err(hdev, "wacom_set_report: ran out of retries " 51 "(last error = %d)\n", retval); 52 53 return retval; 54 } 55 56 static void wacom_wac_queue_insert(struct hid_device *hdev, 57 struct kfifo_rec_ptr_2 *fifo, 58 u8 *raw_data, int size) 59 { 60 bool warned = false; 61 62 while (kfifo_avail(fifo) < size) { 63 if (!warned) 64 hid_warn(hdev, "%s: kfifo has filled, starting to drop events\n", __func__); 65 warned = true; 66 67 kfifo_skip(fifo); 68 } 69 70 kfifo_in(fifo, raw_data, size); 71 } 72 73 static void wacom_wac_queue_flush(struct hid_device *hdev, 74 struct kfifo_rec_ptr_2 *fifo) 75 { 76 while (!kfifo_is_empty(fifo)) { 77 u8 buf[WACOM_PKGLEN_MAX]; 78 int size; 79 int err; 80 81 size = kfifo_out(fifo, buf, sizeof(buf)); 82 err = hid_report_raw_event(hdev, HID_INPUT_REPORT, buf, size, false); 83 if (err) { 84 hid_warn(hdev, "%s: unable to flush event due to error %d\n", 85 __func__, err); 86 } 87 } 88 } 89 90 static int wacom_wac_pen_serial_enforce(struct hid_device *hdev, 91 struct hid_report *report, u8 *raw_data, int report_size) 92 { 93 struct wacom *wacom = hid_get_drvdata(hdev); 94 struct wacom_wac *wacom_wac = &wacom->wacom_wac; 95 struct wacom_features *features = &wacom_wac->features; 96 bool flush = false; 97 bool insert = false; 98 int i, j; 99 100 if (wacom_wac->serial[0] || !(features->quirks & WACOM_QUIRK_TOOLSERIAL)) 101 return 0; 102 103 /* Queue events which have invalid tool type or serial number */ 104 for (i = 0; i < report->maxfield; i++) { 105 for (j = 0; j < report->field[i]->maxusage; j++) { 106 struct hid_field *field = report->field[i]; 107 struct hid_usage *usage = &field->usage[j]; 108 unsigned int equivalent_usage = wacom_equivalent_usage(usage->hid); 109 unsigned int offset; 110 unsigned int size; 111 unsigned int value; 112 113 if (equivalent_usage != HID_DG_INRANGE && 114 equivalent_usage != HID_DG_TOOLSERIALNUMBER && 115 equivalent_usage != WACOM_HID_WD_SERIALHI && 116 equivalent_usage != WACOM_HID_WD_TOOLTYPE) 117 continue; 118 119 offset = field->report_offset; 120 size = field->report_size; 121 value = hid_field_extract(hdev, raw_data+1, offset + j * size, size); 122 123 /* If we go out of range, we need to flush the queue ASAP */ 124 if (equivalent_usage == HID_DG_INRANGE) 125 value = !value; 126 127 if (value) { 128 flush = true; 129 switch (equivalent_usage) { 130 case HID_DG_TOOLSERIALNUMBER: 131 wacom_wac->serial[0] = value; 132 break; 133 134 case WACOM_HID_WD_SERIALHI: 135 wacom_wac->serial[0] |= ((__u64)value) << 32; 136 break; 137 138 case WACOM_HID_WD_TOOLTYPE: 139 wacom_wac->id[0] = value; 140 break; 141 } 142 } 143 else { 144 insert = true; 145 } 146 } 147 } 148 149 if (flush) 150 wacom_wac_queue_flush(hdev, wacom_wac->pen_fifo); 151 else if (insert) 152 wacom_wac_queue_insert(hdev, wacom_wac->pen_fifo, 153 raw_data, report_size); 154 155 return insert && !flush; 156 } 157 158 static int wacom_raw_event(struct hid_device *hdev, struct hid_report *report, 159 u8 *raw_data, int size) 160 { 161 struct wacom *wacom = hid_get_drvdata(hdev); 162 163 if (size > WACOM_PKGLEN_MAX) 164 return 1; 165 166 if (wacom_wac_pen_serial_enforce(hdev, report, raw_data, size)) 167 return -1; 168 169 memcpy(wacom->wacom_wac.data, raw_data, size); 170 171 wacom_wac_irq(&wacom->wacom_wac, size); 172 173 return 0; 174 } 175 176 static int wacom_open(struct input_dev *dev) 177 { 178 struct wacom *wacom = input_get_drvdata(dev); 179 180 return hid_hw_open(wacom->hdev); 181 } 182 183 static void wacom_close(struct input_dev *dev) 184 { 185 struct wacom *wacom = input_get_drvdata(dev); 186 187 /* 188 * wacom->hdev should never be null, but surprisingly, I had the case 189 * once while unplugging the Wacom Wireless Receiver. 190 */ 191 if (wacom->hdev) 192 hid_hw_close(wacom->hdev); 193 } 194 195 /* 196 * Calculate the resolution of the X or Y axis using hidinput_calc_abs_res. 197 */ 198 static int wacom_calc_hid_res(int logical_extents, int physical_extents, 199 unsigned unit, int exponent) 200 { 201 struct hid_field field = { 202 .logical_maximum = logical_extents, 203 .physical_maximum = physical_extents, 204 .unit = unit, 205 .unit_exponent = exponent, 206 }; 207 208 return hidinput_calc_abs_res(&field, ABS_X); 209 } 210 211 static void wacom_hid_usage_quirk(struct hid_device *hdev, 212 struct hid_field *field, struct hid_usage *usage) 213 { 214 struct wacom *wacom = hid_get_drvdata(hdev); 215 struct wacom_features *features = &wacom->wacom_wac.features; 216 unsigned int equivalent_usage = wacom_equivalent_usage(usage->hid); 217 218 /* 219 * The Dell Canvas 27 needs to be switched to its vendor-defined 220 * report to provide the best resolution. 221 */ 222 if (hdev->vendor == USB_VENDOR_ID_WACOM && 223 hdev->product == 0x4200 && 224 field->application == HID_UP_MSVENDOR) { 225 wacom->wacom_wac.mode_report = field->report->id; 226 wacom->wacom_wac.mode_value = 2; 227 } 228 229 /* 230 * ISDv4 devices which predate HID's adoption of the 231 * HID_DG_BARELSWITCH2 usage use 0x000D0000 in its 232 * position instead. We can accurately detect if a 233 * usage with that value should be HID_DG_BARRELSWITCH2 234 * based on the surrounding usages, which have remained 235 * constant across generations. 236 */ 237 if (features->type == HID_GENERIC && 238 usage->hid == 0x000D0000 && 239 field->application == HID_DG_PEN && 240 field->physical == HID_DG_STYLUS) { 241 int i = usage->usage_index; 242 243 if (i-4 >= 0 && i+1 < field->maxusage && 244 field->usage[i-4].hid == HID_DG_TIPSWITCH && 245 field->usage[i-3].hid == HID_DG_BARRELSWITCH && 246 field->usage[i-2].hid == HID_DG_ERASER && 247 field->usage[i-1].hid == HID_DG_INVERT && 248 field->usage[i+1].hid == HID_DG_INRANGE) { 249 usage->hid = HID_DG_BARRELSWITCH2; 250 } 251 } 252 253 /* 254 * Wacom's AES devices use different vendor-defined usages to 255 * report serial number information compared to their branded 256 * hardware. The usages are also sometimes ill-defined and do 257 * not have the correct logical min/max values set. Lets patch 258 * the descriptor to use the branded usage convention and fix 259 * the errors. 260 */ 261 if (usage->hid == WACOM_HID_WT_SERIALNUMBER && 262 field->report_size == 16 && 263 field->index + 2 < field->report->maxfield) { 264 struct hid_field *a = field->report->field[field->index + 1]; 265 struct hid_field *b = field->report->field[field->index + 2]; 266 267 if (a->maxusage > 0 && 268 a->usage[0].hid == HID_DG_TOOLSERIALNUMBER && 269 a->report_size == 32 && 270 b->maxusage > 0 && 271 b->usage[0].hid == 0xFF000000 && 272 b->report_size == 8) { 273 features->quirks |= WACOM_QUIRK_AESPEN; 274 usage->hid = WACOM_HID_WD_TOOLTYPE; 275 field->logical_minimum = S16_MIN; 276 field->logical_maximum = S16_MAX; 277 a->logical_minimum = S32_MIN; 278 a->logical_maximum = S32_MAX; 279 b->usage[0].hid = WACOM_HID_WD_SERIALHI; 280 b->logical_minimum = 0; 281 b->logical_maximum = U8_MAX; 282 } 283 } 284 285 /* 2nd-generation Intuos Pro Large has incorrect Y maximum */ 286 if (hdev->vendor == USB_VENDOR_ID_WACOM && 287 hdev->product == 0x0358 && 288 WACOM_PEN_FIELD(field) && 289 equivalent_usage == HID_GD_Y) { 290 field->logical_maximum = 43200; 291 } 292 } 293 294 static void wacom_feature_mapping(struct hid_device *hdev, 295 struct hid_field *field, struct hid_usage *usage) 296 { 297 struct wacom *wacom = hid_get_drvdata(hdev); 298 struct wacom_features *features = &wacom->wacom_wac.features; 299 struct hid_data *hid_data = &wacom->wacom_wac.hid_data; 300 unsigned int equivalent_usage = wacom_equivalent_usage(usage->hid); 301 u8 *data; 302 int ret; 303 u32 n; 304 305 wacom_hid_usage_quirk(hdev, field, usage); 306 307 switch (equivalent_usage) { 308 case WACOM_HID_WD_TOUCH_RING_SETTING: 309 wacom->generic_has_leds = true; 310 break; 311 case HID_DG_CONTACTMAX: 312 /* leave touch_max as is if predefined */ 313 if (!features->touch_max) { 314 /* read manually */ 315 n = hid_report_len(field->report); 316 data = hid_alloc_report_buf(field->report, GFP_KERNEL); 317 if (!data) 318 break; 319 data[0] = field->report->id; 320 ret = wacom_get_report(hdev, HID_FEATURE_REPORT, 321 data, n, WAC_CMD_RETRIES); 322 if (ret == n && features->type == HID_GENERIC) { 323 ret = hid_report_raw_event(hdev, 324 HID_FEATURE_REPORT, data, n, 0); 325 } else if (ret == 2 && features->type != HID_GENERIC) { 326 features->touch_max = data[1]; 327 } else { 328 features->touch_max = 16; 329 hid_warn(hdev, "wacom_feature_mapping: " 330 "could not get HID_DG_CONTACTMAX, " 331 "defaulting to %d\n", 332 features->touch_max); 333 } 334 kfree(data); 335 } 336 break; 337 case HID_DG_INPUTMODE: 338 /* Ignore if value index is out of bounds. */ 339 if (usage->usage_index >= field->report_count) { 340 dev_err(&hdev->dev, "HID_DG_INPUTMODE out of range\n"); 341 break; 342 } 343 344 hid_data->inputmode = field->report->id; 345 hid_data->inputmode_index = usage->usage_index; 346 break; 347 348 case HID_UP_DIGITIZER: 349 if (field->report->id == 0x0B && 350 (field->application == WACOM_HID_G9_PEN || 351 field->application == WACOM_HID_G11_PEN)) { 352 wacom->wacom_wac.mode_report = field->report->id; 353 wacom->wacom_wac.mode_value = 0; 354 } 355 break; 356 357 case WACOM_HID_WD_DATAMODE: 358 wacom->wacom_wac.mode_report = field->report->id; 359 wacom->wacom_wac.mode_value = 2; 360 break; 361 362 case WACOM_HID_UP_G9: 363 case WACOM_HID_UP_G11: 364 if (field->report->id == 0x03 && 365 (field->application == WACOM_HID_G9_TOUCHSCREEN || 366 field->application == WACOM_HID_G11_TOUCHSCREEN)) { 367 wacom->wacom_wac.mode_report = field->report->id; 368 wacom->wacom_wac.mode_value = 0; 369 } 370 break; 371 case WACOM_HID_WD_OFFSETLEFT: 372 case WACOM_HID_WD_OFFSETTOP: 373 case WACOM_HID_WD_OFFSETRIGHT: 374 case WACOM_HID_WD_OFFSETBOTTOM: 375 /* read manually */ 376 n = hid_report_len(field->report); 377 data = hid_alloc_report_buf(field->report, GFP_KERNEL); 378 if (!data) 379 break; 380 data[0] = field->report->id; 381 ret = wacom_get_report(hdev, HID_FEATURE_REPORT, 382 data, n, WAC_CMD_RETRIES); 383 if (ret == n) { 384 ret = hid_report_raw_event(hdev, HID_FEATURE_REPORT, 385 data, n, 0); 386 } else { 387 hid_warn(hdev, "%s: could not retrieve sensor offsets\n", 388 __func__); 389 } 390 kfree(data); 391 break; 392 } 393 } 394 395 /* 396 * Interface Descriptor of wacom devices can be incomplete and 397 * inconsistent so wacom_features table is used to store stylus 398 * device's packet lengths, various maximum values, and tablet 399 * resolution based on product ID's. 400 * 401 * For devices that contain 2 interfaces, wacom_features table is 402 * inaccurate for the touch interface. Since the Interface Descriptor 403 * for touch interfaces has pretty complete data, this function exists 404 * to query tablet for this missing information instead of hard coding in 405 * an additional table. 406 * 407 * A typical Interface Descriptor for a stylus will contain a 408 * boot mouse application collection that is not of interest and this 409 * function will ignore it. 410 * 411 * It also contains a digitizer application collection that also is not 412 * of interest since any information it contains would be duplicate 413 * of what is in wacom_features. Usually it defines a report of an array 414 * of bytes that could be used as max length of the stylus packet returned. 415 * If it happens to define a Digitizer-Stylus Physical Collection then 416 * the X and Y logical values contain valid data but it is ignored. 417 * 418 * A typical Interface Descriptor for a touch interface will contain a 419 * Digitizer-Finger Physical Collection which will define both logical 420 * X/Y maximum as well as the physical size of tablet. Since touch 421 * interfaces haven't supported pressure or distance, this is enough 422 * information to override invalid values in the wacom_features table. 423 * 424 * Intuos5 touch interface and 3rd gen Bamboo Touch do not contain useful 425 * data. We deal with them after returning from this function. 426 */ 427 static void wacom_usage_mapping(struct hid_device *hdev, 428 struct hid_field *field, struct hid_usage *usage) 429 { 430 struct wacom *wacom = hid_get_drvdata(hdev); 431 struct wacom_features *features = &wacom->wacom_wac.features; 432 bool finger = WACOM_FINGER_FIELD(field); 433 bool pen = WACOM_PEN_FIELD(field); 434 unsigned equivalent_usage = wacom_equivalent_usage(usage->hid); 435 436 /* 437 * Requiring Stylus Usage will ignore boot mouse 438 * X/Y values and some cases of invalid Digitizer X/Y 439 * values commonly reported. 440 */ 441 if (pen) 442 features->device_type |= WACOM_DEVICETYPE_PEN; 443 else if (finger) 444 features->device_type |= WACOM_DEVICETYPE_TOUCH; 445 else 446 return; 447 448 wacom_hid_usage_quirk(hdev, field, usage); 449 450 switch (equivalent_usage) { 451 case HID_GD_X: 452 features->x_max = field->logical_maximum; 453 if (finger) { 454 features->x_phy = field->physical_maximum; 455 if ((features->type != BAMBOO_PT) && 456 (features->type != BAMBOO_TOUCH)) { 457 features->unit = field->unit; 458 features->unitExpo = field->unit_exponent; 459 } 460 } 461 break; 462 case HID_GD_Y: 463 features->y_max = field->logical_maximum; 464 if (finger) { 465 features->y_phy = field->physical_maximum; 466 if ((features->type != BAMBOO_PT) && 467 (features->type != BAMBOO_TOUCH)) { 468 features->unit = field->unit; 469 features->unitExpo = field->unit_exponent; 470 } 471 } 472 break; 473 case HID_DG_TIPPRESSURE: 474 if (pen) 475 features->pressure_max = field->logical_maximum; 476 break; 477 } 478 479 if (features->type == HID_GENERIC) 480 wacom_wac_usage_mapping(hdev, field, usage); 481 } 482 483 static void wacom_post_parse_hid(struct hid_device *hdev, 484 struct wacom_features *features) 485 { 486 struct wacom *wacom = hid_get_drvdata(hdev); 487 struct wacom_wac *wacom_wac = &wacom->wacom_wac; 488 489 if (features->type == HID_GENERIC) { 490 /* Any last-minute generic device setup */ 491 if (wacom_wac->has_mode_change) { 492 if (wacom_wac->is_direct_mode) 493 features->device_type |= WACOM_DEVICETYPE_DIRECT; 494 else 495 features->device_type &= ~WACOM_DEVICETYPE_DIRECT; 496 } 497 498 if (features->touch_max > 1) { 499 if (features->device_type & WACOM_DEVICETYPE_DIRECT) 500 input_mt_init_slots(wacom_wac->touch_input, 501 wacom_wac->features.touch_max, 502 INPUT_MT_DIRECT); 503 else 504 input_mt_init_slots(wacom_wac->touch_input, 505 wacom_wac->features.touch_max, 506 INPUT_MT_POINTER); 507 } 508 } 509 } 510 511 static void wacom_parse_hid(struct hid_device *hdev, 512 struct wacom_features *features) 513 { 514 struct hid_report_enum *rep_enum; 515 struct hid_report *hreport; 516 int i, j; 517 518 /* check features first */ 519 rep_enum = &hdev->report_enum[HID_FEATURE_REPORT]; 520 list_for_each_entry(hreport, &rep_enum->report_list, list) { 521 for (i = 0; i < hreport->maxfield; i++) { 522 /* Ignore if report count is out of bounds. */ 523 if (hreport->field[i]->report_count < 1) 524 continue; 525 526 for (j = 0; j < hreport->field[i]->maxusage; j++) { 527 wacom_feature_mapping(hdev, hreport->field[i], 528 hreport->field[i]->usage + j); 529 } 530 } 531 } 532 533 /* now check the input usages */ 534 rep_enum = &hdev->report_enum[HID_INPUT_REPORT]; 535 list_for_each_entry(hreport, &rep_enum->report_list, list) { 536 537 if (!hreport->maxfield) 538 continue; 539 540 for (i = 0; i < hreport->maxfield; i++) 541 for (j = 0; j < hreport->field[i]->maxusage; j++) 542 wacom_usage_mapping(hdev, hreport->field[i], 543 hreport->field[i]->usage + j); 544 } 545 546 wacom_post_parse_hid(hdev, features); 547 } 548 549 static int wacom_hid_set_device_mode(struct hid_device *hdev) 550 { 551 struct wacom *wacom = hid_get_drvdata(hdev); 552 struct hid_data *hid_data = &wacom->wacom_wac.hid_data; 553 struct hid_report *r; 554 struct hid_report_enum *re; 555 556 if (hid_data->inputmode < 0) 557 return 0; 558 559 re = &(hdev->report_enum[HID_FEATURE_REPORT]); 560 r = re->report_id_hash[hid_data->inputmode]; 561 if (r) { 562 r->field[0]->value[hid_data->inputmode_index] = 2; 563 hid_hw_request(hdev, r, HID_REQ_SET_REPORT); 564 } 565 return 0; 566 } 567 568 static int wacom_set_device_mode(struct hid_device *hdev, 569 struct wacom_wac *wacom_wac) 570 { 571 u8 *rep_data; 572 struct hid_report *r; 573 struct hid_report_enum *re; 574 u32 length; 575 int error = -ENOMEM, limit = 0; 576 577 if (wacom_wac->mode_report < 0) 578 return 0; 579 580 re = &(hdev->report_enum[HID_FEATURE_REPORT]); 581 r = re->report_id_hash[wacom_wac->mode_report]; 582 if (!r) 583 return -EINVAL; 584 585 rep_data = hid_alloc_report_buf(r, GFP_KERNEL); 586 if (!rep_data) 587 return -ENOMEM; 588 589 length = hid_report_len(r); 590 591 do { 592 rep_data[0] = wacom_wac->mode_report; 593 rep_data[1] = wacom_wac->mode_value; 594 595 error = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data, 596 length, 1); 597 if (error >= 0) 598 error = wacom_get_report(hdev, HID_FEATURE_REPORT, 599 rep_data, length, 1); 600 } while (error >= 0 && 601 rep_data[1] != wacom_wac->mode_report && 602 limit++ < WAC_MSG_RETRIES); 603 604 kfree(rep_data); 605 606 return error < 0 ? error : 0; 607 } 608 609 static int wacom_bt_query_tablet_data(struct hid_device *hdev, u8 speed, 610 struct wacom_features *features) 611 { 612 struct wacom *wacom = hid_get_drvdata(hdev); 613 int ret; 614 u8 rep_data[2]; 615 616 switch (features->type) { 617 case GRAPHIRE_BT: 618 rep_data[0] = 0x03; 619 rep_data[1] = 0x00; 620 ret = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data, 2, 621 3); 622 623 if (ret >= 0) { 624 rep_data[0] = speed == 0 ? 0x05 : 0x06; 625 rep_data[1] = 0x00; 626 627 ret = wacom_set_report(hdev, HID_FEATURE_REPORT, 628 rep_data, 2, 3); 629 630 if (ret >= 0) { 631 wacom->wacom_wac.bt_high_speed = speed; 632 return 0; 633 } 634 } 635 636 /* 637 * Note that if the raw queries fail, it's not a hard failure 638 * and it is safe to continue 639 */ 640 hid_warn(hdev, "failed to poke device, command %d, err %d\n", 641 rep_data[0], ret); 642 break; 643 case INTUOS4WL: 644 if (speed == 1) 645 wacom->wacom_wac.bt_features &= ~0x20; 646 else 647 wacom->wacom_wac.bt_features |= 0x20; 648 649 rep_data[0] = 0x03; 650 rep_data[1] = wacom->wacom_wac.bt_features; 651 652 ret = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data, 2, 653 1); 654 if (ret >= 0) 655 wacom->wacom_wac.bt_high_speed = speed; 656 break; 657 } 658 659 return 0; 660 } 661 662 /* 663 * Switch the tablet into its most-capable mode. Wacom tablets are 664 * typically configured to power-up in a mode which sends mouse-like 665 * reports to the OS. To get absolute position, pressure data, etc. 666 * from the tablet, it is necessary to switch the tablet out of this 667 * mode and into one which sends the full range of tablet data. 668 */ 669 static int _wacom_query_tablet_data(struct wacom *wacom) 670 { 671 struct hid_device *hdev = wacom->hdev; 672 struct wacom_wac *wacom_wac = &wacom->wacom_wac; 673 struct wacom_features *features = &wacom_wac->features; 674 675 if (hdev->bus == BUS_BLUETOOTH) 676 return wacom_bt_query_tablet_data(hdev, 1, features); 677 678 if (features->type != HID_GENERIC) { 679 if (features->device_type & WACOM_DEVICETYPE_TOUCH) { 680 if (features->type > TABLETPC) { 681 /* MT Tablet PC touch */ 682 wacom_wac->mode_report = 3; 683 wacom_wac->mode_value = 4; 684 } else if (features->type == WACOM_24HDT) { 685 wacom_wac->mode_report = 18; 686 wacom_wac->mode_value = 2; 687 } else if (features->type == WACOM_27QHDT) { 688 wacom_wac->mode_report = 131; 689 wacom_wac->mode_value = 2; 690 } else if (features->type == BAMBOO_PAD) { 691 wacom_wac->mode_report = 2; 692 wacom_wac->mode_value = 2; 693 } 694 } else if (features->device_type & WACOM_DEVICETYPE_PEN) { 695 if (features->type <= BAMBOO_PT) { 696 wacom_wac->mode_report = 2; 697 wacom_wac->mode_value = 2; 698 } 699 } 700 } 701 702 wacom_set_device_mode(hdev, wacom_wac); 703 704 if (features->type == HID_GENERIC) 705 return wacom_hid_set_device_mode(hdev); 706 707 return 0; 708 } 709 710 static void wacom_retrieve_hid_descriptor(struct hid_device *hdev, 711 struct wacom_features *features) 712 { 713 struct wacom *wacom = hid_get_drvdata(hdev); 714 struct usb_interface *intf = wacom->intf; 715 716 /* default features */ 717 features->x_fuzz = 4; 718 features->y_fuzz = 4; 719 features->pressure_fuzz = 0; 720 features->distance_fuzz = 1; 721 features->tilt_fuzz = 1; 722 723 /* 724 * The wireless device HID is basic and layout conflicts with 725 * other tablets (monitor and touch interface can look like pen). 726 * Skip the query for this type and modify defaults based on 727 * interface number. 728 */ 729 if (features->type == WIRELESS) { 730 if (intf->cur_altsetting->desc.bInterfaceNumber == 0) 731 features->device_type = WACOM_DEVICETYPE_WL_MONITOR; 732 else 733 features->device_type = WACOM_DEVICETYPE_NONE; 734 return; 735 } 736 737 wacom_parse_hid(hdev, features); 738 } 739 740 struct wacom_hdev_data { 741 struct list_head list; 742 struct kref kref; 743 struct hid_device *dev; 744 struct wacom_shared shared; 745 }; 746 747 static LIST_HEAD(wacom_udev_list); 748 static DEFINE_MUTEX(wacom_udev_list_lock); 749 750 static bool wacom_are_sibling(struct hid_device *hdev, 751 struct hid_device *sibling) 752 { 753 struct wacom *wacom = hid_get_drvdata(hdev); 754 struct wacom_features *features = &wacom->wacom_wac.features; 755 struct wacom *sibling_wacom = hid_get_drvdata(sibling); 756 struct wacom_features *sibling_features = &sibling_wacom->wacom_wac.features; 757 __u32 oVid = features->oVid ? features->oVid : hdev->vendor; 758 __u32 oPid = features->oPid ? features->oPid : hdev->product; 759 760 /* The defined oVid/oPid must match that of the sibling */ 761 if (features->oVid != HID_ANY_ID && sibling->vendor != oVid) 762 return false; 763 if (features->oPid != HID_ANY_ID && sibling->product != oPid) 764 return false; 765 766 /* 767 * Devices with the same VID/PID must share the same physical 768 * device path, while those with different VID/PID must share 769 * the same physical parent device path. 770 */ 771 if (hdev->vendor == sibling->vendor && hdev->product == sibling->product) { 772 if (!hid_compare_device_paths(hdev, sibling, '/')) 773 return false; 774 } else { 775 if (!hid_compare_device_paths(hdev, sibling, '.')) 776 return false; 777 } 778 779 /* Skip the remaining heuristics unless you are a HID_GENERIC device */ 780 if (features->type != HID_GENERIC) 781 return true; 782 783 /* 784 * Direct-input devices may not be siblings of indirect-input 785 * devices. 786 */ 787 if ((features->device_type & WACOM_DEVICETYPE_DIRECT) && 788 !(sibling_features->device_type & WACOM_DEVICETYPE_DIRECT)) 789 return false; 790 791 /* 792 * Indirect-input devices may not be siblings of direct-input 793 * devices. 794 */ 795 if (!(features->device_type & WACOM_DEVICETYPE_DIRECT) && 796 (sibling_features->device_type & WACOM_DEVICETYPE_DIRECT)) 797 return false; 798 799 /* Pen devices may only be siblings of touch devices */ 800 if ((features->device_type & WACOM_DEVICETYPE_PEN) && 801 !(sibling_features->device_type & WACOM_DEVICETYPE_TOUCH)) 802 return false; 803 804 /* Touch devices may only be siblings of pen devices */ 805 if ((features->device_type & WACOM_DEVICETYPE_TOUCH) && 806 !(sibling_features->device_type & WACOM_DEVICETYPE_PEN)) 807 return false; 808 809 /* 810 * No reason could be found for these two devices to NOT be 811 * siblings, so there's a good chance they ARE siblings 812 */ 813 return true; 814 } 815 816 static struct wacom_hdev_data *wacom_get_hdev_data(struct hid_device *hdev) 817 { 818 struct wacom_hdev_data *data; 819 820 /* Try to find an already-probed interface from the same device */ 821 list_for_each_entry(data, &wacom_udev_list, list) { 822 if (hid_compare_device_paths(hdev, data->dev, '/')) { 823 kref_get(&data->kref); 824 return data; 825 } 826 } 827 828 /* Fallback to finding devices that appear to be "siblings" */ 829 list_for_each_entry(data, &wacom_udev_list, list) { 830 if (wacom_are_sibling(hdev, data->dev)) { 831 kref_get(&data->kref); 832 return data; 833 } 834 } 835 836 return NULL; 837 } 838 839 static void wacom_release_shared_data(struct kref *kref) 840 { 841 struct wacom_hdev_data *data = 842 container_of(kref, struct wacom_hdev_data, kref); 843 844 mutex_lock(&wacom_udev_list_lock); 845 list_del(&data->list); 846 mutex_unlock(&wacom_udev_list_lock); 847 848 kfree(data); 849 } 850 851 static void wacom_remove_shared_data(void *res) 852 { 853 struct wacom *wacom = res; 854 struct wacom_hdev_data *data; 855 struct wacom_wac *wacom_wac = &wacom->wacom_wac; 856 857 if (wacom_wac->shared) { 858 data = container_of(wacom_wac->shared, struct wacom_hdev_data, 859 shared); 860 861 if (wacom_wac->shared->touch == wacom->hdev) 862 wacom_wac->shared->touch = NULL; 863 else if (wacom_wac->shared->pen == wacom->hdev) 864 wacom_wac->shared->pen = NULL; 865 866 kref_put(&data->kref, wacom_release_shared_data); 867 wacom_wac->shared = NULL; 868 } 869 } 870 871 static int wacom_add_shared_data(struct hid_device *hdev) 872 { 873 struct wacom *wacom = hid_get_drvdata(hdev); 874 struct wacom_wac *wacom_wac = &wacom->wacom_wac; 875 struct wacom_hdev_data *data; 876 int retval = 0; 877 878 mutex_lock(&wacom_udev_list_lock); 879 880 data = wacom_get_hdev_data(hdev); 881 if (!data) { 882 data = kzalloc(sizeof(struct wacom_hdev_data), GFP_KERNEL); 883 if (!data) { 884 retval = -ENOMEM; 885 goto out; 886 } 887 888 kref_init(&data->kref); 889 data->dev = hdev; 890 list_add_tail(&data->list, &wacom_udev_list); 891 } 892 893 wacom_wac->shared = &data->shared; 894 895 retval = devm_add_action(&hdev->dev, wacom_remove_shared_data, wacom); 896 if (retval) { 897 mutex_unlock(&wacom_udev_list_lock); 898 wacom_remove_shared_data(wacom); 899 return retval; 900 } 901 902 if (wacom_wac->features.device_type & WACOM_DEVICETYPE_TOUCH) 903 wacom_wac->shared->touch = hdev; 904 else if (wacom_wac->features.device_type & WACOM_DEVICETYPE_PEN) 905 wacom_wac->shared->pen = hdev; 906 907 out: 908 mutex_unlock(&wacom_udev_list_lock); 909 return retval; 910 } 911 912 static int wacom_led_control(struct wacom *wacom) 913 { 914 unsigned char *buf; 915 int retval; 916 unsigned char report_id = WAC_CMD_LED_CONTROL; 917 int buf_size = 9; 918 919 if (!wacom->led.groups) 920 return -ENOTSUPP; 921 922 if (wacom->wacom_wac.features.type == REMOTE) 923 return -ENOTSUPP; 924 925 if (wacom->wacom_wac.pid) { /* wireless connected */ 926 report_id = WAC_CMD_WL_LED_CONTROL; 927 buf_size = 13; 928 } 929 else if (wacom->wacom_wac.features.type == INTUOSP2_BT) { 930 report_id = WAC_CMD_WL_INTUOSP2; 931 buf_size = 51; 932 } 933 buf = kzalloc(buf_size, GFP_KERNEL); 934 if (!buf) 935 return -ENOMEM; 936 937 if (wacom->wacom_wac.features.type == HID_GENERIC) { 938 buf[0] = WAC_CMD_LED_CONTROL_GENERIC; 939 buf[1] = wacom->led.llv; 940 buf[2] = wacom->led.groups[0].select & 0x03; 941 942 } else if ((wacom->wacom_wac.features.type >= INTUOS5S && 943 wacom->wacom_wac.features.type <= INTUOSPL)) { 944 /* 945 * Touch Ring and crop mark LED luminance may take on 946 * one of four values: 947 * 0 = Low; 1 = Medium; 2 = High; 3 = Off 948 */ 949 int ring_led = wacom->led.groups[0].select & 0x03; 950 int ring_lum = (((wacom->led.llv & 0x60) >> 5) - 1) & 0x03; 951 int crop_lum = 0; 952 unsigned char led_bits = (crop_lum << 4) | (ring_lum << 2) | (ring_led); 953 954 buf[0] = report_id; 955 if (wacom->wacom_wac.pid) { 956 wacom_get_report(wacom->hdev, HID_FEATURE_REPORT, 957 buf, buf_size, WAC_CMD_RETRIES); 958 buf[0] = report_id; 959 buf[4] = led_bits; 960 } else 961 buf[1] = led_bits; 962 } 963 else if (wacom->wacom_wac.features.type == INTUOSP2_BT) { 964 buf[0] = report_id; 965 buf[4] = 100; // Power Connection LED (ORANGE) 966 buf[5] = 100; // BT Connection LED (BLUE) 967 buf[6] = 100; // Paper Mode (RED?) 968 buf[7] = 100; // Paper Mode (GREEN?) 969 buf[8] = 100; // Paper Mode (BLUE?) 970 buf[9] = wacom->led.llv; 971 buf[10] = wacom->led.groups[0].select & 0x03; 972 } 973 else { 974 int led = wacom->led.groups[0].select | 0x4; 975 976 if (wacom->wacom_wac.features.type == WACOM_21UX2 || 977 wacom->wacom_wac.features.type == WACOM_24HD) 978 led |= (wacom->led.groups[1].select << 4) | 0x40; 979 980 buf[0] = report_id; 981 buf[1] = led; 982 buf[2] = wacom->led.llv; 983 buf[3] = wacom->led.hlv; 984 buf[4] = wacom->led.img_lum; 985 } 986 987 retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, buf_size, 988 WAC_CMD_RETRIES); 989 kfree(buf); 990 991 return retval; 992 } 993 994 static int wacom_led_putimage(struct wacom *wacom, int button_id, u8 xfer_id, 995 const unsigned len, const void *img) 996 { 997 unsigned char *buf; 998 int i, retval; 999 const unsigned chunk_len = len / 4; /* 4 chunks are needed to be sent */ 1000 1001 buf = kzalloc(chunk_len + 3 , GFP_KERNEL); 1002 if (!buf) 1003 return -ENOMEM; 1004 1005 /* Send 'start' command */ 1006 buf[0] = WAC_CMD_ICON_START; 1007 buf[1] = 1; 1008 retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, 2, 1009 WAC_CMD_RETRIES); 1010 if (retval < 0) 1011 goto out; 1012 1013 buf[0] = xfer_id; 1014 buf[1] = button_id & 0x07; 1015 for (i = 0; i < 4; i++) { 1016 buf[2] = i; 1017 memcpy(buf + 3, img + i * chunk_len, chunk_len); 1018 1019 retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, 1020 buf, chunk_len + 3, WAC_CMD_RETRIES); 1021 if (retval < 0) 1022 break; 1023 } 1024 1025 /* Send 'stop' */ 1026 buf[0] = WAC_CMD_ICON_START; 1027 buf[1] = 0; 1028 wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, 2, 1029 WAC_CMD_RETRIES); 1030 1031 out: 1032 kfree(buf); 1033 return retval; 1034 } 1035 1036 static ssize_t wacom_led_select_store(struct device *dev, int set_id, 1037 const char *buf, size_t count) 1038 { 1039 struct hid_device *hdev = to_hid_device(dev); 1040 struct wacom *wacom = hid_get_drvdata(hdev); 1041 unsigned int id; 1042 int err; 1043 1044 err = kstrtouint(buf, 10, &id); 1045 if (err) 1046 return err; 1047 1048 mutex_lock(&wacom->lock); 1049 1050 wacom->led.groups[set_id].select = id & 0x3; 1051 err = wacom_led_control(wacom); 1052 1053 mutex_unlock(&wacom->lock); 1054 1055 return err < 0 ? err : count; 1056 } 1057 1058 #define DEVICE_LED_SELECT_ATTR(SET_ID) \ 1059 static ssize_t wacom_led##SET_ID##_select_store(struct device *dev, \ 1060 struct device_attribute *attr, const char *buf, size_t count) \ 1061 { \ 1062 return wacom_led_select_store(dev, SET_ID, buf, count); \ 1063 } \ 1064 static ssize_t wacom_led##SET_ID##_select_show(struct device *dev, \ 1065 struct device_attribute *attr, char *buf) \ 1066 { \ 1067 struct hid_device *hdev = to_hid_device(dev);\ 1068 struct wacom *wacom = hid_get_drvdata(hdev); \ 1069 return scnprintf(buf, PAGE_SIZE, "%d\n", \ 1070 wacom->led.groups[SET_ID].select); \ 1071 } \ 1072 static DEVICE_ATTR(status_led##SET_ID##_select, DEV_ATTR_RW_PERM, \ 1073 wacom_led##SET_ID##_select_show, \ 1074 wacom_led##SET_ID##_select_store) 1075 1076 DEVICE_LED_SELECT_ATTR(0); 1077 DEVICE_LED_SELECT_ATTR(1); 1078 1079 static ssize_t wacom_luminance_store(struct wacom *wacom, u8 *dest, 1080 const char *buf, size_t count) 1081 { 1082 unsigned int value; 1083 int err; 1084 1085 err = kstrtouint(buf, 10, &value); 1086 if (err) 1087 return err; 1088 1089 mutex_lock(&wacom->lock); 1090 1091 *dest = value & 0x7f; 1092 err = wacom_led_control(wacom); 1093 1094 mutex_unlock(&wacom->lock); 1095 1096 return err < 0 ? err : count; 1097 } 1098 1099 #define DEVICE_LUMINANCE_ATTR(name, field) \ 1100 static ssize_t wacom_##name##_luminance_store(struct device *dev, \ 1101 struct device_attribute *attr, const char *buf, size_t count) \ 1102 { \ 1103 struct hid_device *hdev = to_hid_device(dev);\ 1104 struct wacom *wacom = hid_get_drvdata(hdev); \ 1105 \ 1106 return wacom_luminance_store(wacom, &wacom->led.field, \ 1107 buf, count); \ 1108 } \ 1109 static ssize_t wacom_##name##_luminance_show(struct device *dev, \ 1110 struct device_attribute *attr, char *buf) \ 1111 { \ 1112 struct wacom *wacom = dev_get_drvdata(dev); \ 1113 return scnprintf(buf, PAGE_SIZE, "%d\n", wacom->led.field); \ 1114 } \ 1115 static DEVICE_ATTR(name##_luminance, DEV_ATTR_RW_PERM, \ 1116 wacom_##name##_luminance_show, \ 1117 wacom_##name##_luminance_store) 1118 1119 DEVICE_LUMINANCE_ATTR(status0, llv); 1120 DEVICE_LUMINANCE_ATTR(status1, hlv); 1121 DEVICE_LUMINANCE_ATTR(buttons, img_lum); 1122 1123 static ssize_t wacom_button_image_store(struct device *dev, int button_id, 1124 const char *buf, size_t count) 1125 { 1126 struct hid_device *hdev = to_hid_device(dev); 1127 struct wacom *wacom = hid_get_drvdata(hdev); 1128 int err; 1129 unsigned len; 1130 u8 xfer_id; 1131 1132 if (hdev->bus == BUS_BLUETOOTH) { 1133 len = 256; 1134 xfer_id = WAC_CMD_ICON_BT_XFER; 1135 } else { 1136 len = 1024; 1137 xfer_id = WAC_CMD_ICON_XFER; 1138 } 1139 1140 if (count != len) 1141 return -EINVAL; 1142 1143 mutex_lock(&wacom->lock); 1144 1145 err = wacom_led_putimage(wacom, button_id, xfer_id, len, buf); 1146 1147 mutex_unlock(&wacom->lock); 1148 1149 return err < 0 ? err : count; 1150 } 1151 1152 #define DEVICE_BTNIMG_ATTR(BUTTON_ID) \ 1153 static ssize_t wacom_btnimg##BUTTON_ID##_store(struct device *dev, \ 1154 struct device_attribute *attr, const char *buf, size_t count) \ 1155 { \ 1156 return wacom_button_image_store(dev, BUTTON_ID, buf, count); \ 1157 } \ 1158 static DEVICE_ATTR(button##BUTTON_ID##_rawimg, DEV_ATTR_WO_PERM, \ 1159 NULL, wacom_btnimg##BUTTON_ID##_store) 1160 1161 DEVICE_BTNIMG_ATTR(0); 1162 DEVICE_BTNIMG_ATTR(1); 1163 DEVICE_BTNIMG_ATTR(2); 1164 DEVICE_BTNIMG_ATTR(3); 1165 DEVICE_BTNIMG_ATTR(4); 1166 DEVICE_BTNIMG_ATTR(5); 1167 DEVICE_BTNIMG_ATTR(6); 1168 DEVICE_BTNIMG_ATTR(7); 1169 1170 static struct attribute *cintiq_led_attrs[] = { 1171 &dev_attr_status_led0_select.attr, 1172 &dev_attr_status_led1_select.attr, 1173 NULL 1174 }; 1175 1176 static const struct attribute_group cintiq_led_attr_group = { 1177 .name = "wacom_led", 1178 .attrs = cintiq_led_attrs, 1179 }; 1180 1181 static struct attribute *intuos4_led_attrs[] = { 1182 &dev_attr_status0_luminance.attr, 1183 &dev_attr_status1_luminance.attr, 1184 &dev_attr_status_led0_select.attr, 1185 &dev_attr_buttons_luminance.attr, 1186 &dev_attr_button0_rawimg.attr, 1187 &dev_attr_button1_rawimg.attr, 1188 &dev_attr_button2_rawimg.attr, 1189 &dev_attr_button3_rawimg.attr, 1190 &dev_attr_button4_rawimg.attr, 1191 &dev_attr_button5_rawimg.attr, 1192 &dev_attr_button6_rawimg.attr, 1193 &dev_attr_button7_rawimg.attr, 1194 NULL 1195 }; 1196 1197 static const struct attribute_group intuos4_led_attr_group = { 1198 .name = "wacom_led", 1199 .attrs = intuos4_led_attrs, 1200 }; 1201 1202 static struct attribute *intuos5_led_attrs[] = { 1203 &dev_attr_status0_luminance.attr, 1204 &dev_attr_status_led0_select.attr, 1205 NULL 1206 }; 1207 1208 static const struct attribute_group intuos5_led_attr_group = { 1209 .name = "wacom_led", 1210 .attrs = intuos5_led_attrs, 1211 }; 1212 1213 static struct attribute *generic_led_attrs[] = { 1214 &dev_attr_status0_luminance.attr, 1215 &dev_attr_status_led0_select.attr, 1216 NULL 1217 }; 1218 1219 static const struct attribute_group generic_led_attr_group = { 1220 .name = "wacom_led", 1221 .attrs = generic_led_attrs, 1222 }; 1223 1224 struct wacom_sysfs_group_devres { 1225 const struct attribute_group *group; 1226 struct kobject *root; 1227 }; 1228 1229 static void wacom_devm_sysfs_group_release(struct device *dev, void *res) 1230 { 1231 struct wacom_sysfs_group_devres *devres = res; 1232 struct kobject *kobj = devres->root; 1233 1234 dev_dbg(dev, "%s: dropping reference to %s\n", 1235 __func__, devres->group->name); 1236 sysfs_remove_group(kobj, devres->group); 1237 } 1238 1239 static int __wacom_devm_sysfs_create_group(struct wacom *wacom, 1240 struct kobject *root, 1241 const struct attribute_group *group) 1242 { 1243 struct wacom_sysfs_group_devres *devres; 1244 int error; 1245 1246 devres = devres_alloc(wacom_devm_sysfs_group_release, 1247 sizeof(struct wacom_sysfs_group_devres), 1248 GFP_KERNEL); 1249 if (!devres) 1250 return -ENOMEM; 1251 1252 devres->group = group; 1253 devres->root = root; 1254 1255 error = sysfs_create_group(devres->root, group); 1256 if (error) { 1257 devres_free(devres); 1258 return error; 1259 } 1260 1261 devres_add(&wacom->hdev->dev, devres); 1262 1263 return 0; 1264 } 1265 1266 static int wacom_devm_sysfs_create_group(struct wacom *wacom, 1267 const struct attribute_group *group) 1268 { 1269 return __wacom_devm_sysfs_create_group(wacom, &wacom->hdev->dev.kobj, 1270 group); 1271 } 1272 1273 static void wacom_devm_kfifo_release(struct device *dev, void *res) 1274 { 1275 struct kfifo_rec_ptr_2 *devres = res; 1276 1277 kfifo_free(devres); 1278 } 1279 1280 static int wacom_devm_kfifo_alloc(struct wacom *wacom) 1281 { 1282 struct wacom_wac *wacom_wac = &wacom->wacom_wac; 1283 struct kfifo_rec_ptr_2 *pen_fifo; 1284 int error; 1285 1286 pen_fifo = devres_alloc(wacom_devm_kfifo_release, 1287 sizeof(struct kfifo_rec_ptr_2), 1288 GFP_KERNEL); 1289 1290 if (!pen_fifo) 1291 return -ENOMEM; 1292 1293 error = kfifo_alloc(pen_fifo, WACOM_PKGLEN_MAX, GFP_KERNEL); 1294 if (error) { 1295 devres_free(pen_fifo); 1296 return error; 1297 } 1298 1299 devres_add(&wacom->hdev->dev, pen_fifo); 1300 wacom_wac->pen_fifo = pen_fifo; 1301 1302 return 0; 1303 } 1304 1305 enum led_brightness wacom_leds_brightness_get(struct wacom_led *led) 1306 { 1307 struct wacom *wacom = led->wacom; 1308 1309 if (wacom->led.max_hlv) 1310 return led->hlv * LED_FULL / wacom->led.max_hlv; 1311 1312 if (wacom->led.max_llv) 1313 return led->llv * LED_FULL / wacom->led.max_llv; 1314 1315 /* device doesn't support brightness tuning */ 1316 return LED_FULL; 1317 } 1318 1319 static enum led_brightness __wacom_led_brightness_get(struct led_classdev *cdev) 1320 { 1321 struct wacom_led *led = container_of(cdev, struct wacom_led, cdev); 1322 struct wacom *wacom = led->wacom; 1323 1324 if (wacom->led.groups[led->group].select != led->id) 1325 return LED_OFF; 1326 1327 return wacom_leds_brightness_get(led); 1328 } 1329 1330 static int wacom_led_brightness_set(struct led_classdev *cdev, 1331 enum led_brightness brightness) 1332 { 1333 struct wacom_led *led = container_of(cdev, struct wacom_led, cdev); 1334 struct wacom *wacom = led->wacom; 1335 int error; 1336 1337 mutex_lock(&wacom->lock); 1338 1339 if (!wacom->led.groups || (brightness == LED_OFF && 1340 wacom->led.groups[led->group].select != led->id)) { 1341 error = 0; 1342 goto out; 1343 } 1344 1345 led->llv = wacom->led.llv = wacom->led.max_llv * brightness / LED_FULL; 1346 led->hlv = wacom->led.hlv = wacom->led.max_hlv * brightness / LED_FULL; 1347 1348 wacom->led.groups[led->group].select = led->id; 1349 1350 error = wacom_led_control(wacom); 1351 1352 out: 1353 mutex_unlock(&wacom->lock); 1354 1355 return error; 1356 } 1357 1358 static void wacom_led_readonly_brightness_set(struct led_classdev *cdev, 1359 enum led_brightness brightness) 1360 { 1361 } 1362 1363 static int wacom_led_register_one(struct device *dev, struct wacom *wacom, 1364 struct wacom_led *led, unsigned int group, 1365 unsigned int id, bool read_only) 1366 { 1367 int error; 1368 char *name; 1369 1370 name = devm_kasprintf(dev, GFP_KERNEL, 1371 "%s::wacom-%d.%d", 1372 dev_name(dev), 1373 group, 1374 id); 1375 if (!name) 1376 return -ENOMEM; 1377 1378 if (!read_only) { 1379 led->trigger.name = name; 1380 error = devm_led_trigger_register(dev, &led->trigger); 1381 if (error) { 1382 hid_err(wacom->hdev, 1383 "failed to register LED trigger %s: %d\n", 1384 led->cdev.name, error); 1385 return error; 1386 } 1387 } 1388 1389 led->group = group; 1390 led->id = id; 1391 led->wacom = wacom; 1392 led->llv = wacom->led.llv; 1393 led->hlv = wacom->led.hlv; 1394 led->cdev.name = name; 1395 led->cdev.max_brightness = LED_FULL; 1396 led->cdev.flags = LED_HW_PLUGGABLE; 1397 led->cdev.brightness_get = __wacom_led_brightness_get; 1398 if (!read_only) { 1399 led->cdev.brightness_set_blocking = wacom_led_brightness_set; 1400 led->cdev.default_trigger = led->cdev.name; 1401 } else { 1402 led->cdev.brightness_set = wacom_led_readonly_brightness_set; 1403 } 1404 1405 error = devm_led_classdev_register(dev, &led->cdev); 1406 if (error) { 1407 hid_err(wacom->hdev, 1408 "failed to register LED %s: %d\n", 1409 led->cdev.name, error); 1410 led->cdev.name = NULL; 1411 return error; 1412 } 1413 1414 return 0; 1415 } 1416 1417 static void wacom_led_groups_release_one(void *data) 1418 { 1419 struct wacom_group_leds *group = data; 1420 1421 devres_release_group(group->dev, group); 1422 } 1423 1424 static int wacom_led_groups_alloc_and_register_one(struct device *dev, 1425 struct wacom *wacom, 1426 int group_id, int count, 1427 bool read_only) 1428 { 1429 struct wacom_led *leds; 1430 int i, error; 1431 1432 if (group_id >= wacom->led.count || count <= 0) 1433 return -EINVAL; 1434 1435 if (!devres_open_group(dev, &wacom->led.groups[group_id], GFP_KERNEL)) 1436 return -ENOMEM; 1437 1438 leds = devm_kcalloc(dev, count, sizeof(struct wacom_led), GFP_KERNEL); 1439 if (!leds) { 1440 error = -ENOMEM; 1441 goto err; 1442 } 1443 1444 wacom->led.groups[group_id].leds = leds; 1445 wacom->led.groups[group_id].count = count; 1446 1447 for (i = 0; i < count; i++) { 1448 error = wacom_led_register_one(dev, wacom, &leds[i], 1449 group_id, i, read_only); 1450 if (error) 1451 goto err; 1452 } 1453 1454 wacom->led.groups[group_id].dev = dev; 1455 1456 devres_close_group(dev, &wacom->led.groups[group_id]); 1457 1458 /* 1459 * There is a bug (?) in devm_led_classdev_register() in which its 1460 * increments the refcount of the parent. If the parent is an input 1461 * device, that means the ref count never reaches 0 when 1462 * devm_input_device_release() gets called. 1463 * This means that the LEDs are still there after disconnect. 1464 * Manually force the release of the group so that the leds are released 1465 * once we are done using them. 1466 */ 1467 error = devm_add_action_or_reset(&wacom->hdev->dev, 1468 wacom_led_groups_release_one, 1469 &wacom->led.groups[group_id]); 1470 if (error) 1471 return error; 1472 1473 return 0; 1474 1475 err: 1476 devres_release_group(dev, &wacom->led.groups[group_id]); 1477 return error; 1478 } 1479 1480 struct wacom_led *wacom_led_find(struct wacom *wacom, unsigned int group_id, 1481 unsigned int id) 1482 { 1483 struct wacom_group_leds *group; 1484 1485 if (group_id >= wacom->led.count) 1486 return NULL; 1487 1488 group = &wacom->led.groups[group_id]; 1489 1490 if (!group->leds) 1491 return NULL; 1492 1493 id %= group->count; 1494 1495 return &group->leds[id]; 1496 } 1497 1498 /* 1499 * wacom_led_next: gives the next available led with a wacom trigger. 1500 * 1501 * returns the next available struct wacom_led which has its default trigger 1502 * or the current one if none is available. 1503 */ 1504 struct wacom_led *wacom_led_next(struct wacom *wacom, struct wacom_led *cur) 1505 { 1506 struct wacom_led *next_led; 1507 int group, next; 1508 1509 if (!wacom || !cur) 1510 return NULL; 1511 1512 group = cur->group; 1513 next = cur->id; 1514 1515 do { 1516 next_led = wacom_led_find(wacom, group, ++next); 1517 if (!next_led || next_led == cur) 1518 return next_led; 1519 } while (next_led->cdev.trigger != &next_led->trigger); 1520 1521 return next_led; 1522 } 1523 1524 static void wacom_led_groups_release(void *data) 1525 { 1526 struct wacom *wacom = data; 1527 1528 wacom->led.groups = NULL; 1529 wacom->led.count = 0; 1530 } 1531 1532 static int wacom_led_groups_allocate(struct wacom *wacom, int count) 1533 { 1534 struct device *dev = &wacom->hdev->dev; 1535 struct wacom_group_leds *groups; 1536 int error; 1537 1538 groups = devm_kcalloc(dev, count, sizeof(struct wacom_group_leds), 1539 GFP_KERNEL); 1540 if (!groups) 1541 return -ENOMEM; 1542 1543 error = devm_add_action_or_reset(dev, wacom_led_groups_release, wacom); 1544 if (error) 1545 return error; 1546 1547 wacom->led.groups = groups; 1548 wacom->led.count = count; 1549 1550 return 0; 1551 } 1552 1553 static int wacom_leds_alloc_and_register(struct wacom *wacom, int group_count, 1554 int led_per_group, bool read_only) 1555 { 1556 struct device *dev; 1557 int i, error; 1558 1559 if (!wacom->wacom_wac.pad_input) 1560 return -EINVAL; 1561 1562 dev = &wacom->wacom_wac.pad_input->dev; 1563 1564 error = wacom_led_groups_allocate(wacom, group_count); 1565 if (error) 1566 return error; 1567 1568 for (i = 0; i < group_count; i++) { 1569 error = wacom_led_groups_alloc_and_register_one(dev, wacom, i, 1570 led_per_group, 1571 read_only); 1572 if (error) 1573 return error; 1574 } 1575 1576 return 0; 1577 } 1578 1579 int wacom_initialize_leds(struct wacom *wacom) 1580 { 1581 int error; 1582 1583 if (!(wacom->wacom_wac.features.device_type & WACOM_DEVICETYPE_PAD)) 1584 return 0; 1585 1586 /* Initialize default values */ 1587 switch (wacom->wacom_wac.features.type) { 1588 case HID_GENERIC: 1589 if (!wacom->generic_has_leds) 1590 return 0; 1591 wacom->led.llv = 100; 1592 wacom->led.max_llv = 100; 1593 1594 error = wacom_leds_alloc_and_register(wacom, 1, 4, false); 1595 if (error) { 1596 hid_err(wacom->hdev, 1597 "cannot create leds err: %d\n", error); 1598 return error; 1599 } 1600 1601 error = wacom_devm_sysfs_create_group(wacom, 1602 &generic_led_attr_group); 1603 break; 1604 1605 case INTUOS4S: 1606 case INTUOS4: 1607 case INTUOS4WL: 1608 case INTUOS4L: 1609 wacom->led.llv = 10; 1610 wacom->led.hlv = 20; 1611 wacom->led.max_llv = 127; 1612 wacom->led.max_hlv = 127; 1613 wacom->led.img_lum = 10; 1614 1615 error = wacom_leds_alloc_and_register(wacom, 1, 4, false); 1616 if (error) { 1617 hid_err(wacom->hdev, 1618 "cannot create leds err: %d\n", error); 1619 return error; 1620 } 1621 1622 error = wacom_devm_sysfs_create_group(wacom, 1623 &intuos4_led_attr_group); 1624 break; 1625 1626 case WACOM_24HD: 1627 case WACOM_21UX2: 1628 wacom->led.llv = 0; 1629 wacom->led.hlv = 0; 1630 wacom->led.img_lum = 0; 1631 1632 error = wacom_leds_alloc_and_register(wacom, 2, 4, false); 1633 if (error) { 1634 hid_err(wacom->hdev, 1635 "cannot create leds err: %d\n", error); 1636 return error; 1637 } 1638 1639 error = wacom_devm_sysfs_create_group(wacom, 1640 &cintiq_led_attr_group); 1641 break; 1642 1643 case INTUOS5S: 1644 case INTUOS5: 1645 case INTUOS5L: 1646 case INTUOSPS: 1647 case INTUOSPM: 1648 case INTUOSPL: 1649 wacom->led.llv = 32; 1650 wacom->led.max_llv = 96; 1651 1652 error = wacom_leds_alloc_and_register(wacom, 1, 4, false); 1653 if (error) { 1654 hid_err(wacom->hdev, 1655 "cannot create leds err: %d\n", error); 1656 return error; 1657 } 1658 1659 error = wacom_devm_sysfs_create_group(wacom, 1660 &intuos5_led_attr_group); 1661 break; 1662 1663 case INTUOSP2_BT: 1664 wacom->led.llv = 50; 1665 wacom->led.max_llv = 100; 1666 error = wacom_leds_alloc_and_register(wacom, 1, 4, false); 1667 if (error) { 1668 hid_err(wacom->hdev, 1669 "cannot create leds err: %d\n", error); 1670 return error; 1671 } 1672 return 0; 1673 1674 case REMOTE: 1675 wacom->led.llv = 255; 1676 wacom->led.max_llv = 255; 1677 error = wacom_led_groups_allocate(wacom, 5); 1678 if (error) { 1679 hid_err(wacom->hdev, 1680 "cannot create leds err: %d\n", error); 1681 return error; 1682 } 1683 return 0; 1684 1685 default: 1686 return 0; 1687 } 1688 1689 if (error) { 1690 hid_err(wacom->hdev, 1691 "cannot create sysfs group err: %d\n", error); 1692 return error; 1693 } 1694 1695 return 0; 1696 } 1697 1698 static void wacom_init_work(struct work_struct *work) 1699 { 1700 struct wacom *wacom = container_of(work, struct wacom, init_work.work); 1701 1702 _wacom_query_tablet_data(wacom); 1703 wacom_led_control(wacom); 1704 } 1705 1706 static void wacom_query_tablet_data(struct wacom *wacom) 1707 { 1708 schedule_delayed_work(&wacom->init_work, msecs_to_jiffies(1000)); 1709 } 1710 1711 static enum power_supply_property wacom_battery_props[] = { 1712 POWER_SUPPLY_PROP_MODEL_NAME, 1713 POWER_SUPPLY_PROP_PRESENT, 1714 POWER_SUPPLY_PROP_STATUS, 1715 POWER_SUPPLY_PROP_SCOPE, 1716 POWER_SUPPLY_PROP_CAPACITY 1717 }; 1718 1719 static int wacom_battery_get_property(struct power_supply *psy, 1720 enum power_supply_property psp, 1721 union power_supply_propval *val) 1722 { 1723 struct wacom_battery *battery = power_supply_get_drvdata(psy); 1724 int ret = 0; 1725 1726 switch (psp) { 1727 case POWER_SUPPLY_PROP_MODEL_NAME: 1728 val->strval = battery->wacom->wacom_wac.name; 1729 break; 1730 case POWER_SUPPLY_PROP_PRESENT: 1731 val->intval = battery->bat_connected; 1732 break; 1733 case POWER_SUPPLY_PROP_SCOPE: 1734 val->intval = POWER_SUPPLY_SCOPE_DEVICE; 1735 break; 1736 case POWER_SUPPLY_PROP_CAPACITY: 1737 val->intval = battery->battery_capacity; 1738 break; 1739 case POWER_SUPPLY_PROP_STATUS: 1740 if (battery->bat_status != WACOM_POWER_SUPPLY_STATUS_AUTO) 1741 val->intval = battery->bat_status; 1742 else if (battery->bat_charging) 1743 val->intval = POWER_SUPPLY_STATUS_CHARGING; 1744 else if (battery->battery_capacity == 100 && 1745 battery->ps_connected) 1746 val->intval = POWER_SUPPLY_STATUS_FULL; 1747 else if (battery->ps_connected) 1748 val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; 1749 else 1750 val->intval = POWER_SUPPLY_STATUS_DISCHARGING; 1751 break; 1752 default: 1753 ret = -EINVAL; 1754 break; 1755 } 1756 1757 return ret; 1758 } 1759 1760 static int __wacom_initialize_battery(struct wacom *wacom, 1761 struct wacom_battery *battery) 1762 { 1763 static atomic_t battery_no = ATOMIC_INIT(0); 1764 struct device *dev = &wacom->hdev->dev; 1765 struct power_supply_config psy_cfg = { .drv_data = battery, }; 1766 struct power_supply *ps_bat; 1767 struct power_supply_desc *bat_desc = &battery->bat_desc; 1768 unsigned long n; 1769 int error; 1770 1771 if (!devres_open_group(dev, bat_desc, GFP_KERNEL)) 1772 return -ENOMEM; 1773 1774 battery->wacom = wacom; 1775 1776 n = atomic_inc_return(&battery_no) - 1; 1777 1778 bat_desc->properties = wacom_battery_props; 1779 bat_desc->num_properties = ARRAY_SIZE(wacom_battery_props); 1780 bat_desc->get_property = wacom_battery_get_property; 1781 sprintf(battery->bat_name, "wacom_battery_%ld", n); 1782 bat_desc->name = battery->bat_name; 1783 bat_desc->type = POWER_SUPPLY_TYPE_USB; 1784 bat_desc->use_for_apm = 0; 1785 1786 ps_bat = devm_power_supply_register(dev, bat_desc, &psy_cfg); 1787 if (IS_ERR(ps_bat)) { 1788 error = PTR_ERR(ps_bat); 1789 goto err; 1790 } 1791 1792 power_supply_powers(ps_bat, &wacom->hdev->dev); 1793 1794 battery->battery = ps_bat; 1795 1796 devres_close_group(dev, bat_desc); 1797 return 0; 1798 1799 err: 1800 devres_release_group(dev, bat_desc); 1801 return error; 1802 } 1803 1804 static int wacom_initialize_battery(struct wacom *wacom) 1805 { 1806 if (wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) 1807 return __wacom_initialize_battery(wacom, &wacom->battery); 1808 1809 return 0; 1810 } 1811 1812 static void wacom_destroy_battery(struct wacom *wacom) 1813 { 1814 if (wacom->battery.battery) { 1815 devres_release_group(&wacom->hdev->dev, 1816 &wacom->battery.bat_desc); 1817 wacom->battery.battery = NULL; 1818 } 1819 } 1820 1821 static ssize_t wacom_show_speed(struct device *dev, 1822 struct device_attribute 1823 *attr, char *buf) 1824 { 1825 struct hid_device *hdev = to_hid_device(dev); 1826 struct wacom *wacom = hid_get_drvdata(hdev); 1827 1828 return sysfs_emit(buf, "%i\n", wacom->wacom_wac.bt_high_speed); 1829 } 1830 1831 static ssize_t wacom_store_speed(struct device *dev, 1832 struct device_attribute *attr, 1833 const char *buf, size_t count) 1834 { 1835 struct hid_device *hdev = to_hid_device(dev); 1836 struct wacom *wacom = hid_get_drvdata(hdev); 1837 u8 new_speed; 1838 1839 if (kstrtou8(buf, 0, &new_speed)) 1840 return -EINVAL; 1841 1842 if (new_speed != 0 && new_speed != 1) 1843 return -EINVAL; 1844 1845 wacom_bt_query_tablet_data(hdev, new_speed, &wacom->wacom_wac.features); 1846 1847 return count; 1848 } 1849 1850 static DEVICE_ATTR(speed, DEV_ATTR_RW_PERM, 1851 wacom_show_speed, wacom_store_speed); 1852 1853 1854 static ssize_t wacom_show_remote_mode(struct kobject *kobj, 1855 struct kobj_attribute *kattr, 1856 char *buf, int index) 1857 { 1858 struct device *dev = kobj_to_dev(kobj->parent); 1859 struct hid_device *hdev = to_hid_device(dev); 1860 struct wacom *wacom = hid_get_drvdata(hdev); 1861 u8 mode; 1862 1863 mode = wacom->led.groups[index].select; 1864 return sprintf(buf, "%d\n", mode < 3 ? mode : -1); 1865 } 1866 1867 #define DEVICE_EKR_ATTR_GROUP(SET_ID) \ 1868 static ssize_t wacom_show_remote##SET_ID##_mode(struct kobject *kobj, \ 1869 struct kobj_attribute *kattr, char *buf) \ 1870 { \ 1871 return wacom_show_remote_mode(kobj, kattr, buf, SET_ID); \ 1872 } \ 1873 static struct kobj_attribute remote##SET_ID##_mode_attr = { \ 1874 .attr = {.name = "remote_mode", \ 1875 .mode = DEV_ATTR_RO_PERM}, \ 1876 .show = wacom_show_remote##SET_ID##_mode, \ 1877 }; \ 1878 static struct attribute *remote##SET_ID##_serial_attrs[] = { \ 1879 &remote##SET_ID##_mode_attr.attr, \ 1880 NULL \ 1881 }; \ 1882 static const struct attribute_group remote##SET_ID##_serial_group = { \ 1883 .name = NULL, \ 1884 .attrs = remote##SET_ID##_serial_attrs, \ 1885 } 1886 1887 DEVICE_EKR_ATTR_GROUP(0); 1888 DEVICE_EKR_ATTR_GROUP(1); 1889 DEVICE_EKR_ATTR_GROUP(2); 1890 DEVICE_EKR_ATTR_GROUP(3); 1891 DEVICE_EKR_ATTR_GROUP(4); 1892 1893 static int wacom_remote_create_attr_group(struct wacom *wacom, __u32 serial, 1894 int index) 1895 { 1896 int error = 0; 1897 struct wacom_remote *remote = wacom->remote; 1898 1899 remote->remotes[index].group.name = devm_kasprintf(&wacom->hdev->dev, 1900 GFP_KERNEL, 1901 "%d", serial); 1902 if (!remote->remotes[index].group.name) 1903 return -ENOMEM; 1904 1905 error = __wacom_devm_sysfs_create_group(wacom, remote->remote_dir, 1906 &remote->remotes[index].group); 1907 if (error) { 1908 remote->remotes[index].group.name = NULL; 1909 hid_err(wacom->hdev, 1910 "cannot create sysfs group err: %d\n", error); 1911 return error; 1912 } 1913 1914 return 0; 1915 } 1916 1917 static int wacom_cmd_unpair_remote(struct wacom *wacom, unsigned char selector) 1918 { 1919 const size_t buf_size = 2; 1920 unsigned char *buf; 1921 int retval; 1922 1923 buf = kzalloc(buf_size, GFP_KERNEL); 1924 if (!buf) 1925 return -ENOMEM; 1926 1927 buf[0] = WAC_CMD_DELETE_PAIRING; 1928 buf[1] = selector; 1929 1930 retval = wacom_set_report(wacom->hdev, HID_OUTPUT_REPORT, buf, 1931 buf_size, WAC_CMD_RETRIES); 1932 kfree(buf); 1933 1934 return retval; 1935 } 1936 1937 static ssize_t wacom_store_unpair_remote(struct kobject *kobj, 1938 struct kobj_attribute *attr, 1939 const char *buf, size_t count) 1940 { 1941 unsigned char selector = 0; 1942 struct device *dev = kobj_to_dev(kobj->parent); 1943 struct hid_device *hdev = to_hid_device(dev); 1944 struct wacom *wacom = hid_get_drvdata(hdev); 1945 int err; 1946 1947 if (!strncmp(buf, "*\n", 2)) { 1948 selector = WAC_CMD_UNPAIR_ALL; 1949 } else { 1950 hid_info(wacom->hdev, "remote: unrecognized unpair code: %s\n", 1951 buf); 1952 return -1; 1953 } 1954 1955 mutex_lock(&wacom->lock); 1956 1957 err = wacom_cmd_unpair_remote(wacom, selector); 1958 mutex_unlock(&wacom->lock); 1959 1960 return err < 0 ? err : count; 1961 } 1962 1963 static struct kobj_attribute unpair_remote_attr = { 1964 .attr = {.name = "unpair_remote", .mode = 0200}, 1965 .store = wacom_store_unpair_remote, 1966 }; 1967 1968 static const struct attribute *remote_unpair_attrs[] = { 1969 &unpair_remote_attr.attr, 1970 NULL 1971 }; 1972 1973 static void wacom_remotes_destroy(void *data) 1974 { 1975 struct wacom *wacom = data; 1976 struct wacom_remote *remote = wacom->remote; 1977 1978 if (!remote) 1979 return; 1980 1981 kobject_put(remote->remote_dir); 1982 kfifo_free(&remote->remote_fifo); 1983 wacom->remote = NULL; 1984 } 1985 1986 static int wacom_initialize_remotes(struct wacom *wacom) 1987 { 1988 int error = 0; 1989 struct wacom_remote *remote; 1990 int i; 1991 1992 if (wacom->wacom_wac.features.type != REMOTE) 1993 return 0; 1994 1995 remote = devm_kzalloc(&wacom->hdev->dev, sizeof(*wacom->remote), 1996 GFP_KERNEL); 1997 if (!remote) 1998 return -ENOMEM; 1999 2000 wacom->remote = remote; 2001 2002 spin_lock_init(&remote->remote_lock); 2003 2004 error = kfifo_alloc(&remote->remote_fifo, 2005 5 * sizeof(struct wacom_remote_data), 2006 GFP_KERNEL); 2007 if (error) { 2008 hid_err(wacom->hdev, "failed allocating remote_fifo\n"); 2009 return -ENOMEM; 2010 } 2011 2012 remote->remotes[0].group = remote0_serial_group; 2013 remote->remotes[1].group = remote1_serial_group; 2014 remote->remotes[2].group = remote2_serial_group; 2015 remote->remotes[3].group = remote3_serial_group; 2016 remote->remotes[4].group = remote4_serial_group; 2017 2018 remote->remote_dir = kobject_create_and_add("wacom_remote", 2019 &wacom->hdev->dev.kobj); 2020 if (!remote->remote_dir) 2021 return -ENOMEM; 2022 2023 error = sysfs_create_files(remote->remote_dir, remote_unpair_attrs); 2024 2025 if (error) { 2026 hid_err(wacom->hdev, 2027 "cannot create sysfs group err: %d\n", error); 2028 return error; 2029 } 2030 2031 for (i = 0; i < WACOM_MAX_REMOTES; i++) { 2032 wacom->led.groups[i].select = WACOM_STATUS_UNKNOWN; 2033 remote->remotes[i].serial = 0; 2034 } 2035 2036 error = devm_add_action_or_reset(&wacom->hdev->dev, 2037 wacom_remotes_destroy, wacom); 2038 if (error) 2039 return error; 2040 2041 return 0; 2042 } 2043 2044 static struct input_dev *wacom_allocate_input(struct wacom *wacom) 2045 { 2046 struct input_dev *input_dev; 2047 struct hid_device *hdev = wacom->hdev; 2048 struct wacom_wac *wacom_wac = &(wacom->wacom_wac); 2049 2050 input_dev = devm_input_allocate_device(&hdev->dev); 2051 if (!input_dev) 2052 return NULL; 2053 2054 input_dev->name = wacom_wac->features.name; 2055 input_dev->phys = hdev->phys; 2056 input_dev->dev.parent = &hdev->dev; 2057 input_dev->open = wacom_open; 2058 input_dev->close = wacom_close; 2059 input_dev->uniq = hdev->uniq; 2060 input_dev->id.bustype = hdev->bus; 2061 input_dev->id.vendor = hdev->vendor; 2062 input_dev->id.product = wacom_wac->pid ? wacom_wac->pid : hdev->product; 2063 input_dev->id.version = hdev->version; 2064 input_set_drvdata(input_dev, wacom); 2065 2066 return input_dev; 2067 } 2068 2069 static int wacom_allocate_inputs(struct wacom *wacom) 2070 { 2071 struct wacom_wac *wacom_wac = &(wacom->wacom_wac); 2072 2073 wacom_wac->pen_input = wacom_allocate_input(wacom); 2074 wacom_wac->touch_input = wacom_allocate_input(wacom); 2075 wacom_wac->pad_input = wacom_allocate_input(wacom); 2076 if (!wacom_wac->pen_input || 2077 !wacom_wac->touch_input || 2078 !wacom_wac->pad_input) 2079 return -ENOMEM; 2080 2081 wacom_wac->pen_input->name = wacom_wac->pen_name; 2082 wacom_wac->touch_input->name = wacom_wac->touch_name; 2083 wacom_wac->pad_input->name = wacom_wac->pad_name; 2084 2085 return 0; 2086 } 2087 2088 static int wacom_register_inputs(struct wacom *wacom) 2089 { 2090 struct input_dev *pen_input_dev, *touch_input_dev, *pad_input_dev; 2091 struct wacom_wac *wacom_wac = &(wacom->wacom_wac); 2092 int error = 0; 2093 2094 pen_input_dev = wacom_wac->pen_input; 2095 touch_input_dev = wacom_wac->touch_input; 2096 pad_input_dev = wacom_wac->pad_input; 2097 2098 if (!pen_input_dev || !touch_input_dev || !pad_input_dev) 2099 return -EINVAL; 2100 2101 error = wacom_setup_pen_input_capabilities(pen_input_dev, wacom_wac); 2102 if (error) { 2103 /* no pen in use on this interface */ 2104 input_free_device(pen_input_dev); 2105 wacom_wac->pen_input = NULL; 2106 pen_input_dev = NULL; 2107 } else { 2108 error = input_register_device(pen_input_dev); 2109 if (error) 2110 goto fail; 2111 } 2112 2113 error = wacom_setup_touch_input_capabilities(touch_input_dev, wacom_wac); 2114 if (error) { 2115 /* no touch in use on this interface */ 2116 input_free_device(touch_input_dev); 2117 wacom_wac->touch_input = NULL; 2118 touch_input_dev = NULL; 2119 } else { 2120 error = input_register_device(touch_input_dev); 2121 if (error) 2122 goto fail; 2123 } 2124 2125 error = wacom_setup_pad_input_capabilities(pad_input_dev, wacom_wac); 2126 if (error) { 2127 /* no pad in use on this interface */ 2128 input_free_device(pad_input_dev); 2129 wacom_wac->pad_input = NULL; 2130 pad_input_dev = NULL; 2131 } else { 2132 error = input_register_device(pad_input_dev); 2133 if (error) 2134 goto fail; 2135 } 2136 2137 return 0; 2138 2139 fail: 2140 wacom_wac->pad_input = NULL; 2141 wacom_wac->touch_input = NULL; 2142 wacom_wac->pen_input = NULL; 2143 return error; 2144 } 2145 2146 /* 2147 * Not all devices report physical dimensions from HID. 2148 * Compute the default from hardcoded logical dimension 2149 * and resolution before driver overwrites them. 2150 */ 2151 static void wacom_set_default_phy(struct wacom_features *features) 2152 { 2153 if (features->x_resolution) { 2154 features->x_phy = (features->x_max * 100) / 2155 features->x_resolution; 2156 features->y_phy = (features->y_max * 100) / 2157 features->y_resolution; 2158 } 2159 } 2160 2161 static void wacom_calculate_res(struct wacom_features *features) 2162 { 2163 /* set unit to "100th of a mm" for devices not reported by HID */ 2164 if (!features->unit) { 2165 features->unit = 0x11; 2166 features->unitExpo = -3; 2167 } 2168 2169 features->x_resolution = wacom_calc_hid_res(features->x_max, 2170 features->x_phy, 2171 features->unit, 2172 features->unitExpo); 2173 features->y_resolution = wacom_calc_hid_res(features->y_max, 2174 features->y_phy, 2175 features->unit, 2176 features->unitExpo); 2177 } 2178 2179 void wacom_battery_work(struct work_struct *work) 2180 { 2181 struct wacom *wacom = container_of(work, struct wacom, battery_work); 2182 2183 if ((wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) && 2184 !wacom->battery.battery) { 2185 wacom_initialize_battery(wacom); 2186 } 2187 else if (!(wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) && 2188 wacom->battery.battery) { 2189 wacom_destroy_battery(wacom); 2190 } 2191 } 2192 2193 static size_t wacom_compute_pktlen(struct hid_device *hdev) 2194 { 2195 struct hid_report_enum *report_enum; 2196 struct hid_report *report; 2197 size_t size = 0; 2198 2199 report_enum = hdev->report_enum + HID_INPUT_REPORT; 2200 2201 list_for_each_entry(report, &report_enum->report_list, list) { 2202 size_t report_size = hid_report_len(report); 2203 if (report_size > size) 2204 size = report_size; 2205 } 2206 2207 return size; 2208 } 2209 2210 static void wacom_update_name(struct wacom *wacom, const char *suffix) 2211 { 2212 struct wacom_wac *wacom_wac = &wacom->wacom_wac; 2213 struct wacom_features *features = &wacom_wac->features; 2214 char name[WACOM_NAME_MAX - 20]; /* Leave some room for suffixes */ 2215 2216 /* Generic devices name unspecified */ 2217 if ((features->type == HID_GENERIC) && !strcmp("Wacom HID", features->name)) { 2218 char *product_name = wacom->hdev->name; 2219 2220 if (hid_is_using_ll_driver(wacom->hdev, &usb_hid_driver)) { 2221 struct usb_interface *intf = to_usb_interface(wacom->hdev->dev.parent); 2222 struct usb_device *dev = interface_to_usbdev(intf); 2223 product_name = dev->product; 2224 } 2225 2226 if (wacom->hdev->bus == BUS_I2C) { 2227 snprintf(name, sizeof(name), "%s %X", 2228 features->name, wacom->hdev->product); 2229 } else if (strstr(product_name, "Wacom") || 2230 strstr(product_name, "wacom") || 2231 strstr(product_name, "WACOM")) { 2232 strlcpy(name, product_name, sizeof(name)); 2233 } else { 2234 snprintf(name, sizeof(name), "Wacom %s", product_name); 2235 } 2236 2237 /* strip out excess whitespaces */ 2238 while (1) { 2239 char *gap = strstr(name, " "); 2240 if (gap == NULL) 2241 break; 2242 /* shift everything including the terminator */ 2243 memmove(gap, gap+1, strlen(gap)); 2244 } 2245 2246 /* get rid of trailing whitespace */ 2247 if (name[strlen(name)-1] == ' ') 2248 name[strlen(name)-1] = '\0'; 2249 } else { 2250 strlcpy(name, features->name, sizeof(name)); 2251 } 2252 2253 snprintf(wacom_wac->name, sizeof(wacom_wac->name), "%s%s", 2254 name, suffix); 2255 2256 /* Append the device type to the name */ 2257 snprintf(wacom_wac->pen_name, sizeof(wacom_wac->pen_name), 2258 "%s%s Pen", name, suffix); 2259 snprintf(wacom_wac->touch_name, sizeof(wacom_wac->touch_name), 2260 "%s%s Finger", name, suffix); 2261 snprintf(wacom_wac->pad_name, sizeof(wacom_wac->pad_name), 2262 "%s%s Pad", name, suffix); 2263 } 2264 2265 static void wacom_release_resources(struct wacom *wacom) 2266 { 2267 struct hid_device *hdev = wacom->hdev; 2268 2269 if (!wacom->resources) 2270 return; 2271 2272 devres_release_group(&hdev->dev, wacom); 2273 2274 wacom->resources = false; 2275 2276 wacom->wacom_wac.pen_input = NULL; 2277 wacom->wacom_wac.touch_input = NULL; 2278 wacom->wacom_wac.pad_input = NULL; 2279 } 2280 2281 static void wacom_set_shared_values(struct wacom_wac *wacom_wac) 2282 { 2283 if (wacom_wac->features.device_type & WACOM_DEVICETYPE_TOUCH) { 2284 wacom_wac->shared->type = wacom_wac->features.type; 2285 wacom_wac->shared->touch_input = wacom_wac->touch_input; 2286 } 2287 2288 if (wacom_wac->has_mute_touch_switch) { 2289 wacom_wac->shared->has_mute_touch_switch = true; 2290 wacom_wac->shared->is_touch_on = true; 2291 } 2292 2293 if (wacom_wac->shared->has_mute_touch_switch && 2294 wacom_wac->shared->touch_input) { 2295 set_bit(EV_SW, wacom_wac->shared->touch_input->evbit); 2296 input_set_capability(wacom_wac->shared->touch_input, EV_SW, 2297 SW_MUTE_DEVICE); 2298 } 2299 } 2300 2301 static int wacom_parse_and_register(struct wacom *wacom, bool wireless) 2302 { 2303 struct wacom_wac *wacom_wac = &wacom->wacom_wac; 2304 struct wacom_features *features = &wacom_wac->features; 2305 struct hid_device *hdev = wacom->hdev; 2306 int error; 2307 unsigned int connect_mask = HID_CONNECT_HIDRAW; 2308 2309 features->pktlen = wacom_compute_pktlen(hdev); 2310 if (features->pktlen > WACOM_PKGLEN_MAX) 2311 return -EINVAL; 2312 2313 if (!devres_open_group(&hdev->dev, wacom, GFP_KERNEL)) 2314 return -ENOMEM; 2315 2316 wacom->resources = true; 2317 2318 error = wacom_allocate_inputs(wacom); 2319 if (error) 2320 goto fail; 2321 2322 /* 2323 * Bamboo Pad has a generic hid handling for the Pen, and we switch it 2324 * into debug mode for the touch part. 2325 * We ignore the other interfaces. 2326 */ 2327 if (features->type == BAMBOO_PAD) { 2328 if (features->pktlen == WACOM_PKGLEN_PENABLED) { 2329 features->type = HID_GENERIC; 2330 } else if ((features->pktlen != WACOM_PKGLEN_BPAD_TOUCH) && 2331 (features->pktlen != WACOM_PKGLEN_BPAD_TOUCH_USB)) { 2332 error = -ENODEV; 2333 goto fail; 2334 } 2335 } 2336 2337 /* set the default size in case we do not get them from hid */ 2338 wacom_set_default_phy(features); 2339 2340 /* Retrieve the physical and logical size for touch devices */ 2341 wacom_retrieve_hid_descriptor(hdev, features); 2342 wacom_setup_device_quirks(wacom); 2343 2344 if (features->device_type == WACOM_DEVICETYPE_NONE && 2345 features->type != WIRELESS) { 2346 error = features->type == HID_GENERIC ? -ENODEV : 0; 2347 2348 dev_warn(&hdev->dev, "Unknown device_type for '%s'. %s.", 2349 hdev->name, 2350 error ? "Ignoring" : "Assuming pen"); 2351 2352 if (error) 2353 goto fail; 2354 2355 features->device_type |= WACOM_DEVICETYPE_PEN; 2356 } 2357 2358 wacom_calculate_res(features); 2359 2360 wacom_update_name(wacom, wireless ? " (WL)" : ""); 2361 2362 /* pen only Bamboo neither support touch nor pad */ 2363 if ((features->type == BAMBOO_PEN) && 2364 ((features->device_type & WACOM_DEVICETYPE_TOUCH) || 2365 (features->device_type & WACOM_DEVICETYPE_PAD))) { 2366 error = -ENODEV; 2367 goto fail; 2368 } 2369 2370 error = wacom_add_shared_data(hdev); 2371 if (error) 2372 goto fail; 2373 2374 if (!(features->device_type & WACOM_DEVICETYPE_WL_MONITOR) && 2375 (features->quirks & WACOM_QUIRK_BATTERY)) { 2376 error = wacom_initialize_battery(wacom); 2377 if (error) 2378 goto fail; 2379 } 2380 2381 error = wacom_register_inputs(wacom); 2382 if (error) 2383 goto fail; 2384 2385 if (wacom->wacom_wac.features.device_type & WACOM_DEVICETYPE_PAD) { 2386 error = wacom_initialize_leds(wacom); 2387 if (error) 2388 goto fail; 2389 2390 error = wacom_initialize_remotes(wacom); 2391 if (error) 2392 goto fail; 2393 } 2394 2395 if (features->type == HID_GENERIC) 2396 connect_mask |= HID_CONNECT_DRIVER; 2397 2398 /* Regular HID work starts now */ 2399 error = hid_hw_start(hdev, connect_mask); 2400 if (error) { 2401 hid_err(hdev, "hw start failed\n"); 2402 goto fail; 2403 } 2404 2405 if (!wireless) { 2406 /* Note that if query fails it is not a hard failure */ 2407 wacom_query_tablet_data(wacom); 2408 } 2409 2410 /* touch only Bamboo doesn't support pen */ 2411 if ((features->type == BAMBOO_TOUCH) && 2412 (features->device_type & WACOM_DEVICETYPE_PEN)) { 2413 cancel_delayed_work_sync(&wacom->init_work); 2414 _wacom_query_tablet_data(wacom); 2415 error = -ENODEV; 2416 goto fail_quirks; 2417 } 2418 2419 if (features->device_type & WACOM_DEVICETYPE_WL_MONITOR) 2420 error = hid_hw_open(hdev); 2421 2422 wacom_set_shared_values(wacom_wac); 2423 devres_close_group(&hdev->dev, wacom); 2424 2425 return 0; 2426 2427 fail_quirks: 2428 hid_hw_stop(hdev); 2429 fail: 2430 wacom_release_resources(wacom); 2431 return error; 2432 } 2433 2434 static void wacom_wireless_work(struct work_struct *work) 2435 { 2436 struct wacom *wacom = container_of(work, struct wacom, wireless_work); 2437 struct usb_device *usbdev = wacom->usbdev; 2438 struct wacom_wac *wacom_wac = &wacom->wacom_wac; 2439 struct hid_device *hdev1, *hdev2; 2440 struct wacom *wacom1, *wacom2; 2441 struct wacom_wac *wacom_wac1, *wacom_wac2; 2442 int error; 2443 2444 /* 2445 * Regardless if this is a disconnect or a new tablet, 2446 * remove any existing input and battery devices. 2447 */ 2448 2449 wacom_destroy_battery(wacom); 2450 2451 /* Stylus interface */ 2452 hdev1 = usb_get_intfdata(usbdev->config->interface[1]); 2453 wacom1 = hid_get_drvdata(hdev1); 2454 wacom_wac1 = &(wacom1->wacom_wac); 2455 wacom_release_resources(wacom1); 2456 2457 /* Touch interface */ 2458 hdev2 = usb_get_intfdata(usbdev->config->interface[2]); 2459 wacom2 = hid_get_drvdata(hdev2); 2460 wacom_wac2 = &(wacom2->wacom_wac); 2461 wacom_release_resources(wacom2); 2462 2463 if (wacom_wac->pid == 0) { 2464 hid_info(wacom->hdev, "wireless tablet disconnected\n"); 2465 } else { 2466 const struct hid_device_id *id = wacom_ids; 2467 2468 hid_info(wacom->hdev, "wireless tablet connected with PID %x\n", 2469 wacom_wac->pid); 2470 2471 while (id->bus) { 2472 if (id->vendor == USB_VENDOR_ID_WACOM && 2473 id->product == wacom_wac->pid) 2474 break; 2475 id++; 2476 } 2477 2478 if (!id->bus) { 2479 hid_info(wacom->hdev, "ignoring unknown PID.\n"); 2480 return; 2481 } 2482 2483 /* Stylus interface */ 2484 wacom_wac1->features = 2485 *((struct wacom_features *)id->driver_data); 2486 2487 wacom_wac1->pid = wacom_wac->pid; 2488 hid_hw_stop(hdev1); 2489 error = wacom_parse_and_register(wacom1, true); 2490 if (error) 2491 goto fail; 2492 2493 /* Touch interface */ 2494 if (wacom_wac1->features.touch_max || 2495 (wacom_wac1->features.type >= INTUOSHT && 2496 wacom_wac1->features.type <= BAMBOO_PT)) { 2497 wacom_wac2->features = 2498 *((struct wacom_features *)id->driver_data); 2499 wacom_wac2->pid = wacom_wac->pid; 2500 hid_hw_stop(hdev2); 2501 error = wacom_parse_and_register(wacom2, true); 2502 if (error) 2503 goto fail; 2504 } 2505 2506 strlcpy(wacom_wac->name, wacom_wac1->name, 2507 sizeof(wacom_wac->name)); 2508 error = wacom_initialize_battery(wacom); 2509 if (error) 2510 goto fail; 2511 } 2512 2513 return; 2514 2515 fail: 2516 wacom_release_resources(wacom1); 2517 wacom_release_resources(wacom2); 2518 return; 2519 } 2520 2521 static void wacom_remote_destroy_one(struct wacom *wacom, unsigned int index) 2522 { 2523 struct wacom_remote *remote = wacom->remote; 2524 u32 serial = remote->remotes[index].serial; 2525 int i; 2526 unsigned long flags; 2527 2528 for (i = 0; i < WACOM_MAX_REMOTES; i++) { 2529 if (remote->remotes[i].serial == serial) { 2530 2531 spin_lock_irqsave(&remote->remote_lock, flags); 2532 remote->remotes[i].registered = false; 2533 spin_unlock_irqrestore(&remote->remote_lock, flags); 2534 2535 if (remote->remotes[i].battery.battery) 2536 devres_release_group(&wacom->hdev->dev, 2537 &remote->remotes[i].battery.bat_desc); 2538 2539 if (remote->remotes[i].group.name) 2540 devres_release_group(&wacom->hdev->dev, 2541 &remote->remotes[i]); 2542 2543 remote->remotes[i].serial = 0; 2544 remote->remotes[i].group.name = NULL; 2545 remote->remotes[i].battery.battery = NULL; 2546 wacom->led.groups[i].select = WACOM_STATUS_UNKNOWN; 2547 } 2548 } 2549 } 2550 2551 static int wacom_remote_create_one(struct wacom *wacom, u32 serial, 2552 unsigned int index) 2553 { 2554 struct wacom_remote *remote = wacom->remote; 2555 struct device *dev = &wacom->hdev->dev; 2556 int error, k; 2557 2558 /* A remote can pair more than once with an EKR, 2559 * check to make sure this serial isn't already paired. 2560 */ 2561 for (k = 0; k < WACOM_MAX_REMOTES; k++) { 2562 if (remote->remotes[k].serial == serial) 2563 break; 2564 } 2565 2566 if (k < WACOM_MAX_REMOTES) { 2567 remote->remotes[index].serial = serial; 2568 return 0; 2569 } 2570 2571 if (!devres_open_group(dev, &remote->remotes[index], GFP_KERNEL)) 2572 return -ENOMEM; 2573 2574 error = wacom_remote_create_attr_group(wacom, serial, index); 2575 if (error) 2576 goto fail; 2577 2578 remote->remotes[index].input = wacom_allocate_input(wacom); 2579 if (!remote->remotes[index].input) { 2580 error = -ENOMEM; 2581 goto fail; 2582 } 2583 remote->remotes[index].input->uniq = remote->remotes[index].group.name; 2584 remote->remotes[index].input->name = wacom->wacom_wac.pad_name; 2585 2586 if (!remote->remotes[index].input->name) { 2587 error = -EINVAL; 2588 goto fail; 2589 } 2590 2591 error = wacom_setup_pad_input_capabilities(remote->remotes[index].input, 2592 &wacom->wacom_wac); 2593 if (error) 2594 goto fail; 2595 2596 remote->remotes[index].serial = serial; 2597 2598 error = input_register_device(remote->remotes[index].input); 2599 if (error) 2600 goto fail; 2601 2602 error = wacom_led_groups_alloc_and_register_one( 2603 &remote->remotes[index].input->dev, 2604 wacom, index, 3, true); 2605 if (error) 2606 goto fail; 2607 2608 remote->remotes[index].registered = true; 2609 2610 devres_close_group(dev, &remote->remotes[index]); 2611 return 0; 2612 2613 fail: 2614 devres_release_group(dev, &remote->remotes[index]); 2615 remote->remotes[index].serial = 0; 2616 return error; 2617 } 2618 2619 static int wacom_remote_attach_battery(struct wacom *wacom, int index) 2620 { 2621 struct wacom_remote *remote = wacom->remote; 2622 int error; 2623 2624 if (!remote->remotes[index].registered) 2625 return 0; 2626 2627 if (remote->remotes[index].battery.battery) 2628 return 0; 2629 2630 if (wacom->led.groups[index].select == WACOM_STATUS_UNKNOWN) 2631 return 0; 2632 2633 error = __wacom_initialize_battery(wacom, 2634 &wacom->remote->remotes[index].battery); 2635 if (error) 2636 return error; 2637 2638 return 0; 2639 } 2640 2641 static void wacom_remote_work(struct work_struct *work) 2642 { 2643 struct wacom *wacom = container_of(work, struct wacom, remote_work); 2644 struct wacom_remote *remote = wacom->remote; 2645 struct wacom_remote_data data; 2646 unsigned long flags; 2647 unsigned int count; 2648 u32 serial; 2649 int i; 2650 2651 spin_lock_irqsave(&remote->remote_lock, flags); 2652 2653 count = kfifo_out(&remote->remote_fifo, &data, sizeof(data)); 2654 2655 if (count != sizeof(data)) { 2656 hid_err(wacom->hdev, 2657 "workitem triggered without status available\n"); 2658 spin_unlock_irqrestore(&remote->remote_lock, flags); 2659 return; 2660 } 2661 2662 if (!kfifo_is_empty(&remote->remote_fifo)) 2663 wacom_schedule_work(&wacom->wacom_wac, WACOM_WORKER_REMOTE); 2664 2665 spin_unlock_irqrestore(&remote->remote_lock, flags); 2666 2667 for (i = 0; i < WACOM_MAX_REMOTES; i++) { 2668 serial = data.remote[i].serial; 2669 if (data.remote[i].connected) { 2670 2671 if (remote->remotes[i].serial == serial) { 2672 wacom_remote_attach_battery(wacom, i); 2673 continue; 2674 } 2675 2676 if (remote->remotes[i].serial) 2677 wacom_remote_destroy_one(wacom, i); 2678 2679 wacom_remote_create_one(wacom, serial, i); 2680 2681 } else if (remote->remotes[i].serial) { 2682 wacom_remote_destroy_one(wacom, i); 2683 } 2684 } 2685 } 2686 2687 static void wacom_mode_change_work(struct work_struct *work) 2688 { 2689 struct wacom *wacom = container_of(work, struct wacom, mode_change_work); 2690 struct wacom_shared *shared = wacom->wacom_wac.shared; 2691 struct wacom *wacom1 = NULL; 2692 struct wacom *wacom2 = NULL; 2693 bool is_direct = wacom->wacom_wac.is_direct_mode; 2694 int error = 0; 2695 2696 if (shared->pen) { 2697 wacom1 = hid_get_drvdata(shared->pen); 2698 wacom_release_resources(wacom1); 2699 hid_hw_stop(wacom1->hdev); 2700 wacom1->wacom_wac.has_mode_change = true; 2701 wacom1->wacom_wac.is_direct_mode = is_direct; 2702 } 2703 2704 if (shared->touch) { 2705 wacom2 = hid_get_drvdata(shared->touch); 2706 wacom_release_resources(wacom2); 2707 hid_hw_stop(wacom2->hdev); 2708 wacom2->wacom_wac.has_mode_change = true; 2709 wacom2->wacom_wac.is_direct_mode = is_direct; 2710 } 2711 2712 if (wacom1) { 2713 error = wacom_parse_and_register(wacom1, false); 2714 if (error) 2715 return; 2716 } 2717 2718 if (wacom2) { 2719 error = wacom_parse_and_register(wacom2, false); 2720 if (error) 2721 return; 2722 } 2723 2724 return; 2725 } 2726 2727 static int wacom_probe(struct hid_device *hdev, 2728 const struct hid_device_id *id) 2729 { 2730 struct usb_interface *intf = to_usb_interface(hdev->dev.parent); 2731 struct usb_device *dev = interface_to_usbdev(intf); 2732 struct wacom *wacom; 2733 struct wacom_wac *wacom_wac; 2734 struct wacom_features *features; 2735 int error; 2736 2737 if (!id->driver_data) 2738 return -EINVAL; 2739 2740 hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS; 2741 2742 /* hid-core sets this quirk for the boot interface */ 2743 hdev->quirks &= ~HID_QUIRK_NOGET; 2744 2745 wacom = devm_kzalloc(&hdev->dev, sizeof(struct wacom), GFP_KERNEL); 2746 if (!wacom) 2747 return -ENOMEM; 2748 2749 hid_set_drvdata(hdev, wacom); 2750 wacom->hdev = hdev; 2751 2752 wacom_wac = &wacom->wacom_wac; 2753 wacom_wac->features = *((struct wacom_features *)id->driver_data); 2754 features = &wacom_wac->features; 2755 2756 if (features->check_for_hid_type && features->hid_type != hdev->type) 2757 return -ENODEV; 2758 2759 error = wacom_devm_kfifo_alloc(wacom); 2760 if (error) 2761 return error; 2762 2763 wacom_wac->hid_data.inputmode = -1; 2764 wacom_wac->mode_report = -1; 2765 2766 wacom->usbdev = dev; 2767 wacom->intf = intf; 2768 mutex_init(&wacom->lock); 2769 INIT_DELAYED_WORK(&wacom->init_work, wacom_init_work); 2770 INIT_WORK(&wacom->wireless_work, wacom_wireless_work); 2771 INIT_WORK(&wacom->battery_work, wacom_battery_work); 2772 INIT_WORK(&wacom->remote_work, wacom_remote_work); 2773 INIT_WORK(&wacom->mode_change_work, wacom_mode_change_work); 2774 2775 /* ask for the report descriptor to be loaded by HID */ 2776 error = hid_parse(hdev); 2777 if (error) { 2778 hid_err(hdev, "parse failed\n"); 2779 return error; 2780 } 2781 2782 error = wacom_parse_and_register(wacom, false); 2783 if (error) 2784 return error; 2785 2786 if (hdev->bus == BUS_BLUETOOTH) { 2787 error = device_create_file(&hdev->dev, &dev_attr_speed); 2788 if (error) 2789 hid_warn(hdev, 2790 "can't create sysfs speed attribute err: %d\n", 2791 error); 2792 } 2793 2794 return 0; 2795 } 2796 2797 static void wacom_remove(struct hid_device *hdev) 2798 { 2799 struct wacom *wacom = hid_get_drvdata(hdev); 2800 struct wacom_wac *wacom_wac = &wacom->wacom_wac; 2801 struct wacom_features *features = &wacom_wac->features; 2802 2803 if (features->device_type & WACOM_DEVICETYPE_WL_MONITOR) 2804 hid_hw_close(hdev); 2805 2806 hid_hw_stop(hdev); 2807 2808 cancel_delayed_work_sync(&wacom->init_work); 2809 cancel_work_sync(&wacom->wireless_work); 2810 cancel_work_sync(&wacom->battery_work); 2811 cancel_work_sync(&wacom->remote_work); 2812 cancel_work_sync(&wacom->mode_change_work); 2813 if (hdev->bus == BUS_BLUETOOTH) 2814 device_remove_file(&hdev->dev, &dev_attr_speed); 2815 2816 /* make sure we don't trigger the LEDs */ 2817 wacom_led_groups_release(wacom); 2818 2819 if (wacom->wacom_wac.features.type != REMOTE) 2820 wacom_release_resources(wacom); 2821 } 2822 2823 #ifdef CONFIG_PM 2824 static int wacom_resume(struct hid_device *hdev) 2825 { 2826 struct wacom *wacom = hid_get_drvdata(hdev); 2827 2828 mutex_lock(&wacom->lock); 2829 2830 /* switch to wacom mode first */ 2831 _wacom_query_tablet_data(wacom); 2832 wacom_led_control(wacom); 2833 2834 mutex_unlock(&wacom->lock); 2835 2836 return 0; 2837 } 2838 2839 static int wacom_reset_resume(struct hid_device *hdev) 2840 { 2841 return wacom_resume(hdev); 2842 } 2843 #endif /* CONFIG_PM */ 2844 2845 static struct hid_driver wacom_driver = { 2846 .name = "wacom", 2847 .id_table = wacom_ids, 2848 .probe = wacom_probe, 2849 .remove = wacom_remove, 2850 .report = wacom_wac_report, 2851 #ifdef CONFIG_PM 2852 .resume = wacom_resume, 2853 .reset_resume = wacom_reset_resume, 2854 #endif 2855 .raw_event = wacom_raw_event, 2856 }; 2857 module_hid_driver(wacom_driver); 2858 2859 MODULE_VERSION(DRIVER_VERSION); 2860 MODULE_AUTHOR(DRIVER_AUTHOR); 2861 MODULE_DESCRIPTION(DRIVER_DESC); 2862 MODULE_LICENSE("GPL"); 2863